-3x-21=2x+4

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Solution for -3x-21=2x+4 equation: 



-3x-21=2x+4

We move all terms to the left:

-3x-21-(2x+4)=0

We get rid of parentheses

-3x-2x-4-21=0

We add all the numbers together, and all the variables

-5x-25=0

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

-5x=25

x=25/-5

x=-5

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