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68=4(5-6r)
We move all terms to the left:
68-(4(5-6r))=0
We add all the numbers together, and all the variables
-(4(-6r+5))+68=0
We calculate terms in parentheses: -(4(-6r+5)), so:We get rid of parentheses
4(-6r+5)
We multiply parentheses
-24r+20
Back to the equation:
-(-24r+20)
24r-20+68=0
We add all the numbers together, and all the variables
24r+48=0
We move all terms containing r to the left, all other terms to the right
24r=-48
r=-48/24
r=-2
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