-13=2x+7x-4

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Solution for -13=2x+7x-4 equation: 



-13=2x+7x-4

We move all terms to the left:

-13-(2x+7x-4)=0

We add all the numbers together, and all the variables

-(9x-4)-13=0

We get rid of parentheses

-9x+4-13=0

We add all the numbers together, and all the variables

-9x-9=0

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

-9x=9

x=9/-9

x=-1

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