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1.7=0.2r+1.3
We move all terms to the left:
1.7-(0.2r+1.3)=0
We get rid of parentheses
-0.2r-1.3+1.7=0
We add all the numbers together, and all the variables
-0.2r+0.4=0
We move all terms containing r to the left, all other terms to the right
-0.2r=-0.4
r=-0.4/-0.2
r=+2
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