-17=-7u+3(u-7)

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Solution for -17=-7u+3(u-7) equation: 



-17=-7u+3(u-7)

We move all terms to the left:

-17-(-7u+3(u-7))=0



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

-7u+3(u-7)

We multiply parentheses

-7u+3u-21

We add all the numbers together, and all the variables

-4u-21

Back to the equation:

-(-4u-21)



We get rid of parentheses

4u+21-17=0

We add all the numbers together, and all the variables

4u+4=0

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

4u=-4

u=-4/4

u=-1

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