i dong know how to do these types of problems

label Algebra
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y=x-4

y=-x+2

May 13th, 2015

y=x-4

y=-x+2

Let add first equation to the second:

y+y=x-4+(-x+2)

2y=-2

y=-1

Substitute y into the first equation:

-1=x-4

-1+4=x

x=3

answer is x=3, y=-1

May 13th, 2015

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May 13th, 2015
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May 13th, 2015
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