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50.60=3.40r+13.20
We move all terms to the left:
50.60-(3.40r+13.20)=0
We add all the numbers together, and all the variables
-(3.40r+13.2)+50.60=0
We add all the numbers together, and all the variables
-(3.40r+13.2)+50.6=0
We get rid of parentheses
-3.40r-13.2+50.6=0
We add all the numbers together, and all the variables
-3.4r+37.4=0
We move all terms containing r to the left, all other terms to the right
-3.4r=-37.4
r=-37.4/-3.4
r=+11
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