8u=9+9u

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Solution for 8u=9+9u equation: 



8u=9+9u

We move all terms to the left:

8u-(9+9u)=0

We add all the numbers together, and all the variables

8u-(9u+9)=0

We get rid of parentheses

8u-9u-9=0

We add all the numbers together, and all the variables

-1u-9=0

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

-u=9

u=9/-1

u=-9

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