-9+7u=8

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Solution for -9+7u=8 equation: 



-9+7u=8

We move all terms to the left:

-9+7u-(8)=0

We add all the numbers together, and all the variables

7u-17=0

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

7u=17

u=17/7

u=2+3/7

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