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18.64=4a+2
We move all terms to the left:
18.64-(4a+2)=0
We get rid of parentheses
-4a-2+18.64=0
We add all the numbers together, and all the variables
-4a+16.64=0
We move all terms containing a to the left, all other terms to the right
-4a=-16.64
a=-16.64/-4
a=4+0.64/4
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