Question

Joanna and Kyle went to store. Joanna bought 2 erasers and 5 pens which altogether cost $17. Kyle

bought 4 erasers and 2 pens which he paid $10 for. Calculate the cost of one eraser and the cost of one
pen.

Answer 1

Erasers are $1 and pens are $3

Explanation:

2x+5y=17

4x+2y=10

y=5-2x

2x+5(5-2x)=17

2x+25-10x=17

8x=8

x=1

plug x in and get 3 for Y

Answer 2

Answer: 2x + 3= 9

Step-by-step explanation: hope it's correct well your welcome