SOLUTION: solve by using sub method 4x-y=10 12x-3y=30

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Question 191197: solve by using sub method
4x-y=10
12x-3y=30
Answer by checkley75(3666) About Me  (Show Source):
You can put this solution on YOUR website!
4x-y=10 or 4x-10=y
12x-3y=30
12x-3(4x-10)=30
12x-12x+30=30
12x-12x=30-30
0=0 no unique solutions because these 2 equations are identical.