3x-7=7(x+3)

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



3x-7=7(x+3)

We move all terms to the left:

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



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

7(x+3)

We multiply parentheses

7x+21

Back to the equation:

-(7x+21)



We get rid of parentheses

3x-7x-21-7=0

We add all the numbers together, and all the variables

-4x-28=0

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

-4x=28

x=28/-4

x=-7

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