The number of miles travelled by Carman is 12 miles
Given data
fares for the cab = $2.10 + $0.80 per mile
carman paid = $11.70
let the number of miles travelled be x
writing the equation
cab charges is 2.10
increments per mile is 0.80
hence
2.10 + 0.80x = 11.70
solving the equation
0.80x = 11.70 - 2.10
0.80x = 9.6
x = 12
The number of miles travelled by Carman is 12 miles
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