SOLUTION: solve the system by substitution: 4x-4y=0 y=2x-5

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Question 107810: solve the system by substitution:
4x-4y=0
y=2x-5
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
Y=2X-5
4X-4(2X-5)=0
4X-8X+20=0
-4X=-20
X=-20/-4
X=5 ANSWER.
Y=2*5-5
Y=10-5
Y=5
PROOF
4*5-4*5=0
20-20=0
0=0