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2(3.4)(3.1)+11.56=a
We move all terms to the left:
2(3.4)(3.1)+11.56-(a)=0
We add all the numbers together, and all the variables
-1a+32.64=0
We move all terms containing a to the left, all other terms to the right
-a=-32.64
a=-32.64/-1
a=32+0.64/1
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