15=-3(u+-2)

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Solution for 15=-3(u+-2) equation: 



15=-3(u+-2)

We move all terms to the left:

15-(-3(u+-2))=0

We add all the numbers together, and all the variables

-(-3(u-2))+15=0



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

-3(u-2)

We multiply parentheses

-3u+6

Back to the equation:

-(-3u+6)



We get rid of parentheses

3u-6+15=0

We add all the numbers together, and all the variables

3u+9=0

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

3u=-9

u=-9/3

u=-3

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