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1.63(r+1)=9.78
We move all terms to the left:
1.63(r+1)-(9.78)=0
We add all the numbers together, and all the variables
1.63(r+1)-9.78=0
We multiply parentheses
1.63r+1.63-9.78=0
We add all the numbers together, and all the variables
1.63r-8.15=0
We move all terms containing r to the left, all other terms to the right
1.63r=8.15
r=8.15/1.63
r=5+1.7763568394003E-15/1.63
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