3a-12+12-3a+2a-1=3

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Solution for 3a-12+12-3a+2a-1=3 equation: 



3a-12+12-3a+2a-1=3

We move all terms to the left:

3a-12+12-3a+2a-1-(3)=0

We add all the numbers together, and all the variables

2a-4=0

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

2a=4

a=4/2

a=2

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