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3.3(12.6r-6.3)=19.2
We move all terms to the left:
3.3(12.6r-6.3)-(19.2)=0
We add all the numbers together, and all the variables
3.3(12.6r-6.3)-19.2=0
We multiply parentheses
39.6r-20.79-19.2=0
We add all the numbers together, and all the variables
39.6r-39.99=0
We move all terms containing r to the left, all other terms to the right
39.6r=39.99
r=39.99/39.6
r=1+0.39/39.6
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