9=-8u+12

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Solution for 9=-8u+12 equation: 



9=-8u+12

We move all terms to the left:

9-(-8u+12)=0

We get rid of parentheses

8u-12+9=0

We add all the numbers together, and all the variables

8u-3=0

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

8u=3

u=3/8

u=3/8

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