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-188.496=9.9a
We move all terms to the left:
-188.496-(9.9a)=0
We add all the numbers together, and all the variables
-(+9.9a)-188.496=0
We get rid of parentheses
-9.9a-188.496=0
We move all terms containing a to the left, all other terms to the right
-9.9a=188.496
a=188.496/-9.9
a=-19+0.39600000000002/9.9
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