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0.8a-8=a+2
We move all terms to the left:
0.8a-8-(a+2)=0
We get rid of parentheses
0.8a-a-2-8=0
We add all the numbers together, and all the variables
-0.2a-10=0
We move all terms containing a to the left, all other terms to the right
-0.2a=10
a=10/-0.2
a=-50
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