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7(5r+5)-7r=6-r
We move all terms to the left:
7(5r+5)-7r-(6-r)=0
We add all the numbers together, and all the variables
7(5r+5)-7r-(-1r+6)=0
We add all the numbers together, and all the variables
-7r+7(5r+5)-(-1r+6)=0
We multiply parentheses
-7r+35r-(-1r+6)+35=0
We get rid of parentheses
-7r+35r+1r-6+35=0
We add all the numbers together, and all the variables
29r+29=0
We move all terms containing r to the left, all other terms to the right
29r=-29
r=-29/29
r=-1
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