Age, Ratio word problem
$begingroup$
A is x years old. In 4 years time his brother B will be 3 times as old as him. Find the age of B in 4 years time.
word-problem ratio
asked Dec 2 '18 at 19:14
WardahWardah
32
$endgroup$
add a comment |
$begingroup$
A is x years old. In 4 years time his brother B will be 3 times as old as him. Find the age of B in 4 years time.
word-problem ratio
asked Dec 2 '18 at 19:14
WardahWardah
32
$endgroup$
1
$begingroup$
What have you tried? See also this ratio problem.
$endgroup$
– Dietrich Burde
Dec 2 '18 at 19:15
$begingroup$
I have tried various approaches. But my teacher restricted me to solve it by algebra.
$endgroup$
– Wardah
Dec 2 '18 at 19:18
add a comment |
$begingroup$
A is x years old. In 4 years time his brother B will be 3 times as old as him. Find the age of B in 4 years time.
word-problem ratio
asked Dec 2 '18 at 19:14
WardahWardah
32
$endgroup$
A is x years old. In 4 years time his brother B will be 3 times as old as him. Find the age of B in 4 years time.
word-problem ratio
word-problem ratio
asked Dec 2 '18 at 19:14
WardahWardah
32
asked Dec 2 '18 at 19:14
WardahWardah
32
edited Dec 2 '18 at 19:19
Wardah
asked Dec 2 '18 at 19:14
WardahWardah
32
asked Dec 2 '18 at 19:14
WardahWardah
32
asked Dec 2 '18 at 19:14
WardahWardah
32
32
1
$begingroup$
What have you tried? See also this ratio problem.
$endgroup$
– Dietrich Burde
Dec 2 '18 at 19:15
$begingroup$
I have tried various approaches. But my teacher restricted me to solve it by algebra.
$endgroup$
– Wardah
Dec 2 '18 at 19:18
add a comment |
1
$begingroup$
What have you tried? See also this ratio problem.
$endgroup$
– Dietrich Burde
Dec 2 '18 at 19:15
$begingroup$
I have tried various approaches. But my teacher restricted me to solve it by algebra.
$endgroup$
– Wardah
Dec 2 '18 at 19:18
1
1
$begingroup$
What have you tried? See also this ratio problem.
$endgroup$
– Dietrich Burde
Dec 2 '18 at 19:15
$begingroup$
What have you tried? See also this ratio problem.
$endgroup$
– Dietrich Burde
Dec 2 '18 at 19:15
$begingroup$
I have tried various approaches. But my teacher restricted me to solve it by algebra.
$endgroup$
– Wardah
Dec 2 '18 at 19:18
$begingroup$
I have tried various approaches. But my teacher restricted me to solve it by algebra.
$endgroup$
– Wardah
Dec 2 '18 at 19:18
add a comment |
1 Answer
1
active
oldest
votes
$begingroup$
$x$ is A's age and let's call B's age $y$ at this point in time
Hint : In 4 years time A: is $x+4$ years old and B is $y+4$ years old
Solution
We know that B will be 3 times older than A in 4 years, aka $3*(x+4)=y+4$
Solving for $y$ : $y=3x+8$
In four years time B will be $y+4$ years old or aka $3x+8+4 = 3x+12$
answered Dec 3 '18 at 10:17
TheD0ubleTTheD0ubleT
39218
$endgroup$
add a comment |
Your Answer
StackExchange.ifUsing("editor", function () {
return StackExchange.using("mathjaxEditing", function () {
StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix) {
StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["$", "$"], ["\\(","\\)"]]);
});
});
}, "mathjax-editing");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "69"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
noCode: true, onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fmath.stackexchange.com%2fquestions%2f3023064%2fage-ratio-word-problem%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
$x$ is A's age and let's call B's age $y$ at this point in time
Hint : In 4 years time A: is $x+4$ years old and B is $y+4$ years old
Solution
We know that B will be 3 times older than A in 4 years, aka $3*(x+4)=y+4$
Solving for $y$ : $y=3x+8$
In four years time B will be $y+4$ years old or aka $3x+8+4 = 3x+12$
answered Dec 3 '18 at 10:17
TheD0ubleTTheD0ubleT
39218
$endgroup$
add a comment |
$begingroup$
$x$ is A's age and let's call B's age $y$ at this point in time
Hint : In 4 years time A: is $x+4$ years old and B is $y+4$ years old
Solution
We know that B will be 3 times older than A in 4 years, aka $3*(x+4)=y+4$
Solving for $y$ : $y=3x+8$
In four years time B will be $y+4$ years old or aka $3x+8+4 = 3x+12$
answered Dec 3 '18 at 10:17
TheD0ubleTTheD0ubleT
39218
$endgroup$
add a comment |
$begingroup$
$x$ is A's age and let's call B's age $y$ at this point in time
Hint : In 4 years time A: is $x+4$ years old and B is $y+4$ years old
Solution
We know that B will be 3 times older than A in 4 years, aka $3*(x+4)=y+4$
Solving for $y$ : $y=3x+8$
In four years time B will be $y+4$ years old or aka $3x+8+4 = 3x+12$
answered Dec 3 '18 at 10:17
TheD0ubleTTheD0ubleT
39218
$endgroup$
$x$ is A's age and let's call B's age $y$ at this point in time
Hint : In 4 years time A: is $x+4$ years old and B is $y+4$ years old
Solution
We know that B will be 3 times older than A in 4 years, aka $3*(x+4)=y+4$
Solving for $y$ : $y=3x+8$
In four years time B will be $y+4$ years old or aka $3x+8+4 = 3x+12$
answered Dec 3 '18 at 10:17
TheD0ubleTTheD0ubleT
39218
answered Dec 3 '18 at 10:17
TheD0ubleTTheD0ubleT
39218
answered Dec 3 '18 at 10:17
TheD0ubleTTheD0ubleT
39218
answered Dec 3 '18 at 10:17
TheD0ubleTTheD0ubleT
39218
39218
add a comment |
add a comment |
Thanks for contributing an answer to Mathematics Stack Exchange!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
Use MathJax to format equations. MathJax reference.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fmath.stackexchange.com%2fquestions%2f3023064%2fage-ratio-word-problem%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
1
$begingroup$
What have you tried? See also this ratio problem.
$endgroup$
– Dietrich Burde
Dec 2 '18 at 19:15
$begingroup$
I have tried various approaches. But my teacher restricted me to solve it by algebra.
$endgroup$
– Wardah
Dec 2 '18 at 19:18