9u-72=-9

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Solution for 9u-72=-9 equation: 



9u-72=-9

We move all terms to the left:

9u-72-(-9)=0

We add all the numbers together, and all the variables

9u-63=0

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

9u=63

u=63/9

u=7

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