9-8u=-9

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Solution for 9-8u=-9 equation: 



9-8u=-9

We move all terms to the left:

9-8u-(-9)=0

We add all the numbers together, and all the variables

-8u+18=0

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

-8u=-18

u=-18/-8

u=2+1/4

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