SOLUTION: I need help in how to find the solution to this math word problem. A car rental company off ers two options. Option A is $21 per day plus $0.13 per mile. Option B is $12 per d

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Question 1007740: I need help in how to find the solution to this math word problem.
A car rental company off ers two options. Option A is $21 per day plus $0.13 per mile. Option B is $12 per day plus $0.38 per mile. If a car is rented for one day, for how many miles will Option B be cheaper?
Option B will be cheaper until the car is rented for___________miles.
Thanks for every ones help.

Answer by rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
12 + 0.38x < 21 + 0.13x
0.38x < 9 + 0.13x
0.25x < 9
x < 36
Option B will be cheaper until the car is rented for 36 miles