7u-45=-2(u-9)

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Solution for 7u-45=-2(u-9) equation: 



7u-45=-2(u-9)

We move all terms to the left:

7u-45-(-2(u-9))=0



We calculate terms in parentheses: -(-2(u-9)), so:

-2(u-9)

We multiply parentheses

-2u+18

Back to the equation:

-(-2u+18)



We get rid of parentheses

7u+2u-18-45=0

We add all the numbers together, and all the variables

9u-63=0

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

9u=63

u=63/9

u=7

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