20+12a=120

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Solution for 20+12a=120 equation: 



20+12a=120

We move all terms to the left:

20+12a-(120)=0

We add all the numbers together, and all the variables

12a-100=0

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

12a=100

a=100/12

a=8+1/3

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