9=2(u+2)-7u

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Solution for 9=2(u+2)-7u equation: 



9=2(u+2)-7u

We move all terms to the left:

9-(2(u+2)-7u)=0



We calculate terms in parentheses: -(2(u+2)-7u), so:

2(u+2)-7u

We add all the numbers together, and all the variables

-7u+2(u+2)

We multiply parentheses

-7u+2u+4

We add all the numbers together, and all the variables

-5u+4

Back to the equation:

-(-5u+4)



We get rid of parentheses

5u-4+9=0

We add all the numbers together, and all the variables

5u+5=0

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

5u=-5

u=-5/5

u=-1

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