-15=5u+7(u-3)

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Solution for -15=5u+7(u-3) equation: 



-15=5u+7(u-3)

We move all terms to the left:

-15-(5u+7(u-3))=0



We calculate terms in parentheses: -(5u+7(u-3)), so:

5u+7(u-3)

We multiply parentheses

5u+7u-21

We add all the numbers together, and all the variables

12u-21

Back to the equation:

-(12u-21)



We get rid of parentheses

-12u+21-15=0

We add all the numbers together, and all the variables

-12u+6=0

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

-12u=-6

u=-6/-12

u=1/2

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