Question

what is the number of red pens in the box?​

Answer 1

Answer:

where the box? bit I can guess almost 5

Answer 2

Answer:

let , x= Red Pen

y = Blue pen

x+y = 80 ____________________ 1)

2.25x + 3.50y = 240 _______________ 2)

x= 80-y

2.25 (80-y) + 3.50y =240

180- 2.25y+3.50y =240

180 +1.25y =240

1.25y=60

y= 48

According to equation (1)

x+y =80

x+48= 80,

x = 32

so there are 32 red pen and 48 blue pen in a box