-21=7/6u

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Solution for -21=7/6u equation: 



-21=7/6u

We move all terms to the left:

-21-(7/6u)=0



Domain of the equation: 6u)!=0

u!=0/1

u!=0

u∈R



We add all the numbers together, and all the variables

-(+7/6u)-21=0

We get rid of parentheses

-7/6u-21=0

We multiply all the terms by the denominator


-21*6u-7=0

Wy multiply elements

-126u-7=0

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

-126u=7

u=7/-126

u=-1/18

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