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1.5=0.3+4r
We move all terms to the left:
1.5-(0.3+4r)=0
We add all the numbers together, and all the variables
-(4r+0.3)+1.5=0
We get rid of parentheses
-4r-0.3+1.5=0
We add all the numbers together, and all the variables
-4r+1.2=0
We move all terms containing r to the left, all other terms to the right
-4r=-1.2
r=-1.2/-4
r=1/3.3333333333333
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