21=-3/8y

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Solution for 21=-3/8y equation: 



21=-3/8y

We move all terms to the left:

21-(-3/8y)=0



Domain of the equation: 8y)!=0

y!=0/1

y!=0

y∈R



We get rid of parentheses

3/8y+21=0

We multiply all the terms by the denominator


21*8y+3=0

Wy multiply elements

168y+3=0

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

168y=-3

y=-3/168

y=-1/56

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