-7x-21=39-10x

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Solution for -7x-21=39-10x equation: 



-7x-21=39-10x

We move all terms to the left:

-7x-21-(39-10x)=0

We add all the numbers together, and all the variables

-7x-(-10x+39)-21=0

We get rid of parentheses

-7x+10x-39-21=0

We add all the numbers together, and all the variables

3x-60=0

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

3x=60

x=60/3

x=20

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