21=3/4a

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Solution for 21=3/4a equation: 



21=3/4a

We move all terms to the left:

21-(3/4a)=0



Domain of the equation: 4a)!=0

a!=0/1

a!=0

a∈R



We add all the numbers together, and all the variables

-(+3/4a)+21=0

We get rid of parentheses

-3/4a+21=0

We multiply all the terms by the denominator


21*4a-3=0

Wy multiply elements

84a-3=0

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

84a=3

a=3/84

a=1/28

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