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12.4=6a-2
We move all terms to the left:
12.4-(6a-2)=0
We get rid of parentheses
-6a+2+12.4=0
We add all the numbers together, and all the variables
-6a+14.4=0
We move all terms containing a to the left, all other terms to the right
-6a=-14.4
a=-14.4/-6
a=2+1/2.5
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