-9+7u=10u+9

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Solution for -9+7u=10u+9 equation: 



-9+7u=10u+9

We move all terms to the left:

-9+7u-(10u+9)=0

We get rid of parentheses

7u-10u-9-9=0

We add all the numbers together, and all the variables

-3u-18=0

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

-3u=18

u=18/-3

u=-6

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