21=7/2y

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Solution for 21=7/2y equation: 



21=7/2y

We move all terms to the left:

21-(7/2y)=0



Domain of the equation: 2y)!=0

y!=0/1

y!=0

y∈R



We add all the numbers together, and all the variables

-(+7/2y)+21=0

We get rid of parentheses

-7/2y+21=0

We multiply all the terms by the denominator


21*2y-7=0

Wy multiply elements

42y-7=0

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

42y=7

y=7/42

y=1/6

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