-(1-4x)=-7x+21

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Solution for -(1-4x)=-7x+21 equation: 



-(1-4x)=-7x+21

We move all terms to the left:

-(1-4x)-(-7x+21)=0

We add all the numbers together, and all the variables

-(-4x+1)-(-7x+21)=0

We get rid of parentheses

4x+7x-1-21=0

We add all the numbers together, and all the variables

11x-22=0

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

11x=22

x=22/11

x=2

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