7=3(u+5)-7u

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



7=3(u+5)-7u

We move all terms to the left:

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



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

3(u+5)-7u

We add all the numbers together, and all the variables

-7u+3(u+5)

We multiply parentheses

-7u+3u+15

We add all the numbers together, and all the variables

-4u+15

Back to the equation:

-(-4u+15)



We get rid of parentheses

4u-15+7=0

We add all the numbers together, and all the variables

4u-8=0

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

4u=8

u=8/4

u=2

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