9u-42=7(u-8)

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Solution for 9u-42=7(u-8) equation: 



9u-42=7(u-8)

We move all terms to the left:

9u-42-(7(u-8))=0



We calculate terms in parentheses: -(7(u-8)), so:

7(u-8)

We multiply parentheses

7u-56

Back to the equation:

-(7u-56)



We get rid of parentheses

9u-7u+56-42=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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