-21=-3/4y

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Solution for -21=-3/4y equation: 



-21=-3/4y

We move all terms to the left:

-21-(-3/4y)=0



Domain of the equation: 4y)!=0

y!=0/1

y!=0

y∈R



We get rid of parentheses

3/4y-21=0

We multiply all the terms by the denominator


-21*4y+3=0

Wy multiply elements

-84y+3=0

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

-84y=-3

y=-3/-84

y=1/28

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