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April 19, 2014

Homework Help: Math

Posted by Cody on Monday, May 28, 2007 at 11:10am.

I can't seem to do this problem. And my grade is riding on it. Can someone please help? I don't know how to solve it. Can someone help me by telling me what I'm doing wrong?

The problem is 3y = 2x + 12

My Work:
0=2x+ 12
--------
2 2

x=6




You cannot solve this equation. It has 2 unknowns.

I can't seem to do this problem. And my grade is riding on it. Can someone please help? I don't know how to solve it. Can someone help me by telling me what I'm doing wrong?

The problem is 3y = 2x + 12

My Work:
0=2x+ 12 How and/or why did you eliminate y from the equation.
--------
2 2

x=6

A ssuming you are seeking integer answers.
1--3y - 2x = 12
2--Dividing through by 2 yields y + y/2 - x = 6
3--y/2 must be an integer k mking y = 2k
4--Substituting back into (1)0 yields 6k - 2x = 12 making x = 3k - 6
5--CLearly, without any other conditions imposed by the problem statement, there are an infinite number of answers.
6--k...0...1...2...3...4...5...6..
...x..-6..-3...0...3...6...9..12..
...y...0...2...4...6...8..10..12..


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Homework Help Forum: Math
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Posted by tchrwill on Monday, May 28, 2007 at 1:22pm in response to Math.
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I can't seem to do this problem. And my grade is riding on it. Can someone please help? I don't know how to solve it. Can someone help me by telling me what I'm doing wrong?

The problem is 3y = 2x + 12

My Work:
0=2x+ 12 How and/or why did you eliminate y from the equation.
--------
2 2

x=6

A ssuming you are seeking integer answers.
1--3y - 2x = 12
2--Dividing through by 2 yields y + y/2 - x = 6
3--y/2 must be an integer k making y = 2k
4--Substituting back into (1) yields 6k - 2x = 12 making x = 3k - 6
5--Clearly, without any other conditions imposed by the problem statement, there are an infinite number of answers.
6--k...0...1...2...3...4...5...6..etc.
...x..-6..-3...0...3...6...9..12..etc.
...y...0...2...4...6...8..10..12..etc.



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