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5.1a=15.3
We move all terms to the left:
5.1a-(15.3)=0
We add all the numbers together, and all the variables
5.1a-15.3=0
We move all terms containing a to the left, all other terms to the right
5.1a=15.3
a=15.3/5.1
a=3+1.7763568394003E-15/5.1
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