-3(-x-5)=21

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Solution for -3(-x-5)=21 equation: 



-3(-x-5)=21

We move all terms to the left:

-3(-x-5)-(21)=0

We add all the numbers together, and all the variables

-3(-1x-5)-21=0

We multiply parentheses

3x+15-21=0

We add all the numbers together, and all the variables

3x-6=0

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

3x=6

x=6/3

x=2

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