15=2(u-3)-5u

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Solution for 15=2(u-3)-5u equation: 



15=2(u-3)-5u

We move all terms to the left:

15-(2(u-3)-5u)=0



We calculate terms in parentheses: -(2(u-3)-5u), so:

2(u-3)-5u

We add all the numbers together, and all the variables

-5u+2(u-3)

We multiply parentheses

-5u+2u-6

We add all the numbers together, and all the variables

-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+21=0

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

3u=-21

u=-21/3

u=-7

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