-3=7(u-3)+2u

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Solution for -3=7(u-3)+2u equation: 



-3=7(u-3)+2u

We move all terms to the left:

-3-(7(u-3)+2u)=0



We calculate terms in parentheses: -(7(u-3)+2u), so:

7(u-3)+2u

We add all the numbers together, and all the variables

2u+7(u-3)

We multiply parentheses

2u+7u-21

We add all the numbers together, and all the variables

9u-21

Back to the equation:

-(9u-21)



We get rid of parentheses

-9u+21-3=0

We add all the numbers together, and all the variables

-9u+18=0

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

-9u=-18

u=-18/-9

u=+2

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