4x-4(21-4x)=-4

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Solution for 4x-4(21-4x)=-4 equation: 



4x-4(21-4x)=-4

We move all terms to the left:

4x-4(21-4x)-(-4)=0

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

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

We multiply parentheses

4x+16x-84+4=0

We add all the numbers together, and all the variables

20x-80=0

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

20x=80

x=80/20

x=4

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