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3.45=a-16
We move all terms to the left:
3.45-(a-16)=0
We get rid of parentheses
-a+16+3.45=0
We add all the numbers together, and all the variables
-1a+19.45=0
We move all terms containing a to the left, all other terms to the right
-a=-19.45
a=-19.45/-1
a=19+0.45/1
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