-7u/4=-21

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Solution for -7u/4=-21 equation: 



-7u/4=-21

We move all terms to the left:

-7u/4-(-21)=0

We add all the numbers together, and all the variables

-7u/4+21=0

We multiply all the terms by the denominator


-7u+21*4=0

We add all the numbers together, and all the variables

-7u+84=0

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

-7u=-84

u=-84/-7

u=+12

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