SOLUTION: solve by the addition method. x-4y=17 5x-4y=21

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Question 1116559: solve by the addition method.
x-4y=17
5x-4y=21

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
1x-4y=17
5x-4y=21
------------- Subtract, or multiply either eqn by -1, then add.