15=a/3+12

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Solution for 15=a/3+12 equation: 



15=a/3+12

We move all terms to the left:

15-(a/3+12)=0

We get rid of parentheses

-a/3-12+15=0

We multiply all the terms by the denominator


-a-12*3+15*3=0

We add all the numbers together, and all the variables

-1a+9=0

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

-a=-9

a=-9/-1

a=+9

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