-4(-x)=21

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



-4(-x)=21

We move all terms to the left:

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

We add all the numbers together, and all the variables

-4(-1x)-21=0

We multiply parentheses

4x-21=0

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

4x=21

x=21/4

x=5+1/4

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