12a-4=20a-5=12a-8

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Solution for 12a-4=20a-5=12a-8 equation: 



12a-4=20a-5=12a-8

We move all terms to the left:

12a-4-(20a-5)=0

We get rid of parentheses

12a-20a+5-4=0

We add all the numbers together, and all the variables

-8a+1=0

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

-8a=-1

a=-1/-8

a=1/8

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