-3=6x+21

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Solution for -3=6x+21 equation: 



-3=6x+21

We move all terms to the left:

-3-(6x+21)=0

We get rid of parentheses

-6x-21-3=0

We add all the numbers together, and all the variables

-6x-24=0

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

-6x=24

x=24/-6

x=-4

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