12a-18=78

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Solution for 12a-18=78 equation: 



12a-18=78

We move all terms to the left:

12a-18-(78)=0

We add all the numbers together, and all the variables

12a-96=0

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

12a=96

a=96/12

a=8

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