SOLUTION: Solve the system by substitution 2x+9y=34 5x-9y=-41

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Question 548452: Solve the system by substitution
2x+9y=34
5x-9y=-41
Answer by mathstutor458(57) About Me  (Show Source):
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2x+9y=34
5x-9y=-41
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7x=-7 (by adding both equations)
x=-7/7 =-1