7x-28=3(3x-7)

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Solution for 7x-28=3(3x-7) equation: 



7x-28=3(3x-7)

We move all terms to the left:

7x-28-(3(3x-7))=0



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

3(3x-7)

We multiply parentheses

9x-21

Back to the equation:

-(9x-21)



We get rid of parentheses

7x-9x+21-28=0

We add all the numbers together, and all the variables

-2x-7=0

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

-2x=7

x=7/-2

x=-3+1/2

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