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-11+10r+11+-33=r+2r+100
We move all terms to the left:
-11+10r+11+-33-(r+2r+100)=0
We add all the numbers together, and all the variables
10r-(3r+100)-11+11-33+=0
We add all the numbers together, and all the variables
10r-(3r+100)=0
We get rid of parentheses
10r-3r-100=0
We add all the numbers together, and all the variables
7r-100=0
We move all terms containing r to the left, all other terms to the right
7r=100
r=100/7
r=14+2/7
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