-77=2x+7x+4

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Solution for -77=2x+7x+4 equation: 



-77=2x+7x+4

We move all terms to the left:

-77-(2x+7x+4)=0

We add all the numbers together, and all the variables

-(9x+4)-77=0

We get rid of parentheses

-9x-4-77=0

We add all the numbers together, and all the variables

-9x-81=0

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

-9x=81

x=81/-9

x=-9

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