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16=a-3.8
We move all terms to the left:
16-(a-3.8)=0
We get rid of parentheses
-a+3.8+16=0
We add all the numbers together, and all the variables
-1a+19.8=0
We move all terms containing a to the left, all other terms to the right
-a=-19.8
a=-19.8/-1
a=19+0.8/1
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