-9u+7=-7(u-3)

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Solution for -9u+7=-7(u-3) equation: 



-9u+7=-7(u-3)

We move all terms to the left:

-9u+7-(-7(u-3))=0



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

-7(u-3)

We multiply parentheses

-7u+21

Back to the equation:

-(-7u+21)



We get rid of parentheses

-9u+7u-21+7=0

We add all the numbers together, and all the variables

-2u-14=0

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

-2u=14

u=14/-2

u=-7

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