3a+12a=12

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Solution for 3a+12a=12 equation: 



3a+12a=12

We move all terms to the left:

3a+12a-(12)=0

We add all the numbers together, and all the variables

15a-12=0

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

15a=12

a=12/15

a=4/5

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