12a-24=42

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Solution for 12a-24=42 equation: 



12a-24=42

We move all terms to the left:

12a-24-(42)=0

We add all the numbers together, and all the variables

12a-66=0

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

12a=66

a=66/12

a=5+1/2

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