7/5a=21

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Solution for 7/5a=21 equation: 



7/5a=21

We move all terms to the left:

7/5a-(21)=0



Domain of the equation: 5a!=0

a!=0/5

a!=0

a∈R



We multiply all the terms by the denominator


-21*5a+7=0

Wy multiply elements

-105a+7=0

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

-105a=-7

a=-7/-105

a=1/15

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