Let's start by forming the equations based on the rental car rates.
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Rental car A: The total cost is given by the initial fee plus the daily rate multiplied by the number of days (\(x\)): \[ \text{Cost of Car A} = 100 + 10x \]
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Rental car B: Similar to car A, the total cost is: \[ \text{Cost of Car B} = 50 + 20x \]
To find out when the costs are equal, we can set the two equations equal to each other: \[ 100 + 10x = 50 + 20x \]
Now, we can solve for \(x\):
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Subtract \(10x\) from both sides: \[ 100 = 50 + 10x \]
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Subtract 50 from both sides: \[ 100 - 50 = 10x \] \[ 50 = 10x \]
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Divide both sides by 10: \[ x = 5 \]
Interpretation of the solution:
The solution \(x = 5\) means that after 5 days, the total rental costs of car A and car B will be equal. At this point, both options would cost the same amount to rent, allowing a renter to decide based on factors other than price, such as the type of vehicle or specific rental policies.