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1.75=a-12.8
We move all terms to the left:
1.75-(a-12.8)=0
We get rid of parentheses
-a+12.8+1.75=0
We add all the numbers together, and all the variables
-1a+14.55=0
We move all terms containing a to the left, all other terms to the right
-a=-14.55
a=-14.55/-1
a=14+0.55/1
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