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1.6a+3=7.8
We move all terms to the left:
1.6a+3-(7.8)=0
We add all the numbers together, and all the variables
1.6a-4.8=0
We move all terms containing a to the left, all other terms to the right
1.6a=4.8
a=4.8/1.6
a=2+1/1
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