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6.4a+11=68.6
We move all terms to the left:
6.4a+11-(68.6)=0
We add all the numbers together, and all the variables
6.4a-57.6=0
We move all terms containing a to the left, all other terms to the right
6.4a=57.6
a=57.6/6.4
a=9
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