-a/3+9=21

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Solution for -a/3+9=21 equation: 



-a/3+9=21

We move all terms to the left:

-a/3+9-(21)=0

We add all the numbers together, and all the variables

-a/3-12=0

We multiply all the terms by the denominator


-a-12*3=0

We add all the numbers together, and all the variables

-1a-36=0

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

-a=36

a=36/-1

a=-36

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