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0.3a-2.16=9.9
We move all terms to the left:
0.3a-2.16-(9.9)=0
We add all the numbers together, and all the variables
0.3a-12.06=0
We move all terms containing a to the left, all other terms to the right
0.3a=12.06
a=12.06/0.3
a=40+0.06/0.3
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