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2.3=a+0.8
We move all terms to the left:
2.3-(a+0.8)=0
We get rid of parentheses
-a-0.8+2.3=0
We add all the numbers together, and all the variables
-1a+1.5=0
We move all terms containing a to the left, all other terms to the right
-a=-1.5
a=-1.5/-1
a=1+0.5/1
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