12a+4a=144

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Solution for 12a+4a=144 equation: 



12a+4a=144

We move all terms to the left:

12a+4a-(144)=0

We add all the numbers together, and all the variables

16a-144=0

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

16a=144

a=144/16

a=9

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