13/4a=21

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Solution for 13/4a=21 equation: 



13/4a=21

We move all terms to the left:

13/4a-(21)=0



Domain of the equation: 4a!=0

a!=0/4

a!=0

a∈R



We multiply all the terms by the denominator


-21*4a+13=0

Wy multiply elements

-84a+13=0

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

-84a=-13

a=-13/-84

a=13/84

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