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2.8a=16.8
We move all terms to the left:
2.8a-(16.8)=0
We add all the numbers together, and all the variables
2.8a-16.8=0
We move all terms containing a to the left, all other terms to the right
2.8a=16.8
a=16.8/2.8
a=6+3.5527136788005E-15/2.8
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