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5.20(1.06)+2.75r=11.70
We move all terms to the left:
5.20(1.06)+2.75r-(11.70)=0
We add all the numbers together, and all the variables
2.75r+5.20(1.06)-(11.7)=0
We add all the numbers together, and all the variables
2.75r-6.188=0
We move all terms containing r to the left, all other terms to the right
2.75r=6.188
r=6.188/2.75
r=2+0.688/2.75
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