3x-7=4(x-7)

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Solution for 3x-7=4(x-7) equation: 



3x-7=4(x-7)

We move all terms to the left:

3x-7-(4(x-7))=0



We calculate terms in parentheses: -(4(x-7)), so:

4(x-7)

We multiply parentheses

4x-28

Back to the equation:

-(4x-28)



We get rid of parentheses

3x-4x+28-7=0

We add all the numbers together, and all the variables

-1x+21=0

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

-x=-21

x=-21/-1

x=+21

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