SOLUTION: Use the substitution to solve the following system x+7y=2 6y+2x=-20

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Question 144927: Use the substitution to solve the following system
x+7y=2
6y+2x=-20
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
x+7y=2
X=2-7Y
6y+2x=-20
6Y+2(2-7Y)=-20
6Y+4-14Y=-20
-8Y=-24
Y=-24/-8
Y=3 ANSWER.
X=2-7*3
X=2-21
X=-19 ANSWER.
PROOF:
6*3+2*-19=-20
18-38=-20
-20=-20