Solving systems of linear equations

label Algebra
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y1=15-x

y2=4x

The solution for this equation is (ordered pair)

Sep 12th, 2015

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Since they are linear equations, I will assume that you do not mean exponents.

y=15-x

y=4x.

Let's subsitute y=4x into the first equation

y=15-x

4x=15-x

3x=15

x=5.

Let's substitute x=5 into y=4x

y=4(5)=20.

Thus, our answer is (5,20).


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Sep 12th, 2015

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Sep 12th, 2015
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Sep 12th, 2015
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