-3(4x+9)=21

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Solution for -3(4x+9)=21 equation: 



-3(4x+9)=21

We move all terms to the left:

-3(4x+9)-(21)=0

We multiply parentheses

-12x-27-21=0

We add all the numbers together, and all the variables

-12x-48=0

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

-12x=48

x=48/-12

x=-4

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