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-0.75=r/25.2
We move all terms to the left:
-0.75-(r/25.2)=0
We add all the numbers together, and all the variables
-(+r/25.2)-0.75=0
We get rid of parentheses
-r/25.2-0.75=0
We multiply all the terms by the denominator
-r-(0.75)*25.2=0
We add all the numbers together, and all the variables
-1r-18.9=0
We move all terms containing r to the left, all other terms to the right
-r=18.9
r=18.9/-1
r=-18+0.9/1
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