6a-12=4a-20

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Solution for 6a-12=4a-20 equation: 



6a-12=4a-20

We move all terms to the left:

6a-12-(4a-20)=0

We get rid of parentheses

6a-4a+20-12=0

We add all the numbers together, and all the variables

2a+8=0

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

2a=-8

a=-8/2

a=-4

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