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6.3=8.3+a
We move all terms to the left:
6.3-(8.3+a)=0
We add all the numbers together, and all the variables
-(a+8.3)+6.3=0
We get rid of parentheses
-a-8.3+6.3=0
We add all the numbers together, and all the variables
-1a-2=0
We move all terms containing a to the left, all other terms to the right
-a=2
a=2/-1
a=-2
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