10u-u+81=9

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Solution for 10u-u+81=9 equation: 



10u-u+81=9

We move all terms to the left:

10u-u+81-(9)=0

We add all the numbers together, and all the variables

9u+72=0

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

9u=-72

u=-72/9

u=-8

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