a+12/2=21

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Solution for a+12/2=21 equation: 



a+12/2=21

We move all terms to the left:

a+12/2-(21)=0

determiningTheFunctionDomain
a-21+12/2=0

We add all the numbers together, and all the variables

a-15=0

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

a=15

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