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-0.9r-9.89-9.4r=-8.8r-3.74
We move all terms to the left:
-0.9r-9.89-9.4r-(-8.8r-3.74)=0
We add all the numbers together, and all the variables
-10.3r-(-8.8r-3.74)-9.89=0
We get rid of parentheses
-10.3r+8.8r+3.74-9.89=0
We add all the numbers together, and all the variables
-1.5r-6.15=0
We move all terms containing r to the left, all other terms to the right
-1.5r=6.15
r=6.15/-1.5
r=-4+0.15/1.5
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