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Mrs. Katz is planning a family vacation. She bought 8 rolls of film and 2 camera batteries for $23.00. The next day, her daughter went back and bought 6 more rolls of film and 2 batteries for her camera. This bill was $18.00. What was the price of a roll of film and a camera battery?

Respuesta :

The price of rolls of film is $2.50 and the price camera batteries is $1.50.

of Two equations can be derived from the  question:

8f + 2b = 23 equation 1

6f + 2b = 18 equation 2

Where:

f = rolls of film

b = camera batteries

In order to determine the value of f, subtract equation 2 from 1

2f = 5

Divide both sides of the equation by 2

f = 2.50

In order to determine the value of b, substitute for f in equation 1:

8(2.50) + 2b = 23

20 + 2b = 23

2b = 23 - 20

2b = 3

b = 1.50

To learn more about simultaneous equations, please check: brainly.com/question/23589883

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