7x-3+2x=-3(-x-7)

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Solution for 7x-3+2x=-3(-x-7) equation: 



7x-3+2x=-3(-x-7)

We move all terms to the left:

7x-3+2x-(-3(-x-7))=0

We add all the numbers together, and all the variables

7x+2x-(-3(-1x-7))-3=0

We add all the numbers together, and all the variables

9x-(-3(-1x-7))-3=0



We calculate terms in parentheses: -(-3(-1x-7)), so:

-3(-1x-7)

We multiply parentheses

3x+21

Back to the equation:

-(3x+21)



We get rid of parentheses

9x-3x-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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