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7.6a+2=2.8a+20.72
We move all terms to the left:
7.6a+2-(2.8a+20.72)=0
We get rid of parentheses
7.6a-2.8a-20.72+2=0
We add all the numbers together, and all the variables
4.8a-18.72=0
We move all terms containing a to the left, all other terms to the right
4.8a=18.72
a=18.72/4.8
a=3+1/1.1111111111111
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