-9u=9-8u

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Solution for -9u=9-8u equation:



-9u=9-8u
We move all terms to the left:
-9u-(9-8u)=0
We add all the numbers together, and all the variables
-9u-(-8u+9)=0
We get rid of parentheses
-9u+8u-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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