7u-45=3(u-7)

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Solution for 7u-45=3(u-7) equation: 



7u-45=3(u-7)

We move all terms to the left:

7u-45-(3(u-7))=0



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

3(u-7)

We multiply parentheses

3u-21

Back to the equation:

-(3u-21)



We get rid of parentheses

7u-3u+21-45=0

We add all the numbers together, and all the variables

4u-24=0

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

4u=24

u=24/4

u=6

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