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35=15.4+r
We move all terms to the left:
35-(15.4+r)=0
We add all the numbers together, and all the variables
-(r+15.4)+35=0
We get rid of parentheses
-r-15.4+35=0
We add all the numbers together, and all the variables
-1r+19.6=0
We move all terms containing r to the left, all other terms to the right
-r=-19.6
r=-19.6/-1
r=19+0.6/1
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