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31.5=a-34.4
We move all terms to the left:
31.5-(a-34.4)=0
We get rid of parentheses
-a+34.4+31.5=0
We add all the numbers together, and all the variables
-1a+65.9=0
We move all terms containing a to the left, all other terms to the right
-a=-65.9
a=-65.9/-1
a=65+0.90000000000001/1
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