3a-12=3

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Solution for 3a-12=3 equation: 



3a-12=3

We move all terms to the left:

3a-12-(3)=0

We add all the numbers together, and all the variables

3a-15=0

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

3a=15

a=15/3

a=5

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