-(-3x-4)=-4x+81

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Solution for -(-3x-4)=-4x+81 equation: 



-(-3x-4)=-4x+81

We move all terms to the left:

-(-3x-4)-(-4x+81)=0

We get rid of parentheses

3x+4x+4-81=0

We add all the numbers together, and all the variables

7x-77=0

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

7x=77

x=77/7

x=11

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