SOLUTION: i need to solve this using the substitution method 8x+2y-7=0 -2x-1y+2=0

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Question 199681This question is from textbook Beginning Algebra
: i need to solve this using the substitution method
8x+2y-7=0
-2x-1y+2=0 This question is from textbook Beginning Algebra

Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
8x+2y-7=0........................eq 1
-2x-1y+2=0---->y=-2x+2...........eq 2
:
take y's value from eq 2 and substitute it into eq 1
:
8x+2(-2x+2)-7=0
:
8x-4x+4-7=0
:
4x=3
:
x=3/4
:
y=-2(3/4)+2=1/2