3a+12=13

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Solution for 3a+12=13 equation: 



3a+12=13

We move all terms to the left:

3a+12-(13)=0

We add all the numbers together, and all the variables

3a-1=0

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

3a=1

a=1/3

a=1/3

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