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5.1a+11=51.8
We move all terms to the left:
5.1a+11-(51.8)=0
We add all the numbers together, and all the variables
5.1a-40.8=0
We move all terms containing a to the left, all other terms to the right
5.1a=40.8
a=40.8/5.1
a=8
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