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0.85=a/7.2
We move all terms to the left:
0.85-(a/7.2)=0
We add all the numbers together, and all the variables
-(+a/7.2)+0.85=0
We get rid of parentheses
-a/7.2+0.85=0
We multiply all the terms by the denominator
-a+(0.85)*7.2=0
We add all the numbers together, and all the variables
-1a+6.12=0
We move all terms containing a to the left, all other terms to the right
-a=-6.12
a=-6.12/-1
a=6+0.12/1
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