Posted by **thomas** on Thursday, February 22, 2007 at 8:30pm.

k well i had to use substitution to find the point of intersection for these 2 equations

x-y=10

3x+y=11

i chose to substitute y in the first equation

my final answer was (-1/2 , 5) can someone clarify this, and if it's wrong, where'd i make a mistake?

In the first equation, y= x-10

put that into the second to get

3x + x-10=11

4x=21

x= 4.25

Then you can solve for y.

It's right! Congrats!

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