7/9a=21

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Solution for 7/9a=21 equation: 



7/9a=21

We move all terms to the left:

7/9a-(21)=0



Domain of the equation: 9a!=0

a!=0/9

a!=0

a∈R



We multiply all the terms by the denominator


-21*9a+7=0

Wy multiply elements

-189a+7=0

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

-189a=-7

a=-7/-189

a=1/27

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