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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We multiply parentheses

-3x+7x-(3(x+7))+21=0



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

3(x+7)

We multiply parentheses

3x+21

Back to the equation:

-(3x+21)



We add all the numbers together, and all the variables

4x-(3x+21)+21=0

We get rid of parentheses

4x-3x-21+21=0

We add all the numbers together, and all the variables

x=0

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