-7/3a=21

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Solution for -7/3a=21 equation: 



-7/3a=21

We move all terms to the left:

-7/3a-(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-7=0

Wy multiply elements

-63a-7=0

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

-63a=7

a=7/-63

a=-1/9

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