15=4(u+3)-7u

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Solution for 15=4(u+3)-7u equation: 



15=4(u+3)-7u

We move all terms to the left:

15-(4(u+3)-7u)=0



We calculate terms in parentheses: -(4(u+3)-7u), so:

4(u+3)-7u

We add all the numbers together, and all the variables

-7u+4(u+3)

We multiply parentheses

-7u+4u+12

We add all the numbers together, and all the variables

-3u+12

Back to the equation:

-(-3u+12)



We get rid of parentheses

3u-12+15=0

We add all the numbers together, and all the variables

3u+3=0

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

3u=-3

u=-3/3

u=-1

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