9(u+4)=6u+21

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Solution for 9(u+4)=6u+21 equation: 



9(u+4)=6u+21

We move all terms to the left:

9(u+4)-(6u+21)=0

We multiply parentheses

9u-(6u+21)+36=0

We get rid of parentheses

9u-6u-21+36=0

We add all the numbers together, and all the variables

3u+15=0

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

3u=-15

u=-15/3

u=-5

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