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7.12a=3.14
We move all terms to the left:
7.12a-(3.14)=0
We add all the numbers together, and all the variables
7.12a-3.14=0
We move all terms containing a to the left, all other terms to the right
7.12a=3.14
a=3.14/7.12
a=2.7543859649123/6.2456140350877
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