-2x+7x=90

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Solution for -2x+7x=90 equation: 



-2x+7x=90

We move all terms to the left:

-2x+7x-(90)=0

We add all the numbers together, and all the variables

5x-90=0

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

5x=90

x=90/5

x=18

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