2/3a=21

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Solution for 2/3a=21 equation: 



2/3a=21

We move all terms to the left:

2/3a-(21)=0



Domain of the equation: 3a!=0

a!=0/3

a!=0

a∈R



We multiply all the terms by the denominator


-21*3a+2=0

Wy multiply elements

-63a+2=0

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

-63a=-2

a=-2/-63

a=2/63

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