## Maddiie 5 years ago Find the solution to each system by the substitution method. 10x+3y=-8 2x+y=2

1. anonymous

second equation gives $y=2-2x$ substitute in the first equation to get $10x+3(2-2x)=-8$

10x=6x+6=-8

3. anonymous

$10x+6-6x=-8$ $4x+6=-8$ $4x=-8-6=-14$ $x=-\frac{14}{4}=-\frac{7}{2}$

Ok

5. anonymous

now you have to substitute back to find y

6. anonymous

$y=2-2x$ $y=2-2\times- \frac{7}{2}$ $y=2+7$ $y=9$

7. anonymous

hold on let me check

I was doing while you were teaching me and i got the smae thing useless i'm wrong too. I am understanding this

9. anonymous

oh yeah it is right!

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