-3(2x+8)=21

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Solution for -3(2x+8)=21 equation: 



-3(2x+8)=21

We move all terms to the left:

-3(2x+8)-(21)=0

We multiply parentheses

-6x-24-21=0

We add all the numbers together, and all the variables

-6x-45=0

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

-6x=45

x=45/-6

x=-7+1/2

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