X-9y=-78

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Solution for X-9y=-78 equation: 



X-9X=-78

We move all terms to the left:

X-9X-(-78)=0

We add all the numbers together, and all the variables

-8X+78=0

We move all terms containing X to the left, all other terms to the right

-8X=-78

X=-78/-8

X=9+3/4

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