SOLUTION: Solve the systems by using substituion or elimination 3x+9y = 36 x- 8y = -10

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Question 111251: Solve the systems by using substituion or elimination
3x+9y = 36
x- 8y = -10


Answer by elima(1433) About Me  (Show Source):
You can put this solution on YOUR website!
3x+9y = 36
x- 8y = -10
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lets solve eq #2 for x, then substitute that answer for x in the first equation;
x=8y-10
3(8y-10)+9y=36
24y-30+9y
33y=36+30
33y=66
y=2
Now lets use that answer for y in equation#1;
3x+9(2)=36
3x+18=36
3x=18
x=6
:)