-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+6=0

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

-12x=-6

x=-6/-12

x=1/2

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