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2.2=a-1.1
We move all terms to the left:
2.2-(a-1.1)=0
We get rid of parentheses
-a+1.1+2.2=0
We add all the numbers together, and all the variables
-1a+3.3=0
We move all terms containing a to the left, all other terms to the right
-a=-3.3
a=-3.3/-1
a=3+0.3/1
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