9(u-3)=-7u+21

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Solution for 9(u-3)=-7u+21 equation: 



9(u-3)=-7u+21

We move all terms to the left:

9(u-3)-(-7u+21)=0

We multiply parentheses

9u-(-7u+21)-27=0

We get rid of parentheses

9u+7u-21-27=0

We add all the numbers together, and all the variables

16u-48=0

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

16u=48

u=48/16

u=3

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