SOLUTION: Solve the system by substitution x-4y=-19 -4x-5y=13

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Question 102598: Solve the system by substitution
x-4y=-19
-4x-5y=13

Answer by MathLover1(20850)   (Show Source): You can put this solution on YOUR website!
I. first find x in this one
II.
then we have
now put this in II. and find y
=





Now we can calculate x



Check:









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