Question

2 pencil, 2 pens, and 1 eraser cost a total of $0.20. 2 pencils, 3 pens, and 3 erasers cost a total of $0.41. 4 pencils, 1 pen, and 2 erasers cost $0.42. How much does it cost to buy 1 pencil, 1 pen, and 1 eraser?

Answer 1

To find the cost of 1 pencil, 1 pen, and 1 eraser, solve the system of equations using substitution or elimination. We can solve this system of equations using substitution or elimination to find the values of p, n, and r. Once we have the values, we can add them together to find the cost of 1 pencil, 1 pen, and 1 eraser.

Step-by-step explanation:

To find the cost of 1 pencil, 1 pen, and 1 eraser, we need to solve a system of equations. Let's assign variables to each item: let p represent the price of a pencil, r represent the price of an eraser, and n represent the price of a pen. From the given information, we can set up the following equations: 2p + 2n + r = 0.20 2p + 3n + 3r = 0.41 4p + n + 2r = 0.42 We can solve this system of equations using substitution or elimination to find the values of p, n, and r. Once we have the values, we can add them together to find the cost of 1 pencil, 1 pen, and 1 eraser.

the cost of 1 pencil, 1 pen, and 1 eraser, solve the system of equations using substitution or elimination. We can solve this system of equations using substitution or elimination to find the values of p, n, and r. Once we have the values, we can add them together to find the cost of 1 pencil, 1 pen, and 1 eraser.