-7x-39=21-9x

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Solution for -7x-39=21-9x equation: 



-7x-39=21-9x

We move all terms to the left:

-7x-39-(21-9x)=0

We add all the numbers together, and all the variables

-7x-(-9x+21)-39=0

We get rid of parentheses

-7x+9x-21-39=0

We add all the numbers together, and all the variables

2x-60=0

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

2x=60

x=60/2

x=30

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