21-2x=-5x=

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Solution for 21-2x=-5x= equation: 



21-2x=-5x=

We move all terms to the left:

21-2x-(-5x)=0

We get rid of parentheses

-2x+5x+21=0

We add all the numbers together, and all the variables

3x+21=0

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

3x=-21

x=-21/3

x=-7

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