-7u/3=21

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Solution for -7u/3=21 equation: 



-7u/3=21

We move all terms to the left:

-7u/3-(21)=0

We multiply all the terms by the denominator


-7u-21*3=0

We add all the numbers together, and all the variables

-7u-63=0

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

-7u=63

u=63/-7

u=-9

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