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3.1a+7=13.82
We move all terms to the left:
3.1a+7-(13.82)=0
We add all the numbers together, and all the variables
3.1a-6.82=0
We move all terms containing a to the left, all other terms to the right
3.1a=6.82
a=6.82/3.1
a=2+0.62/3.1
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