-3u/7=-9

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Solution for -3u/7=-9 equation: 



-3u/7=-9

We move all terms to the left:

-3u/7-(-9)=0

We add all the numbers together, and all the variables

-3u/7+9=0

We multiply all the terms by the denominator


-3u+9*7=0

We add all the numbers together, and all the variables

-3u+63=0

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

-3u=-63

u=-63/-3

u=+21

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