-3(4x+5)=21

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Solution for -3(4x+5)=21 equation: 



-3(4x+5)=21

We move all terms to the left:

-3(4x+5)-(21)=0

We multiply parentheses

-12x-15-21=0

We add all the numbers together, and all the variables

-12x-36=0

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

-12x=36

x=36/-12

x=-3

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