Answer:
number of box of pen = 16
number of box of ribbon bands = 8
Step-by-step explanation:
Let
number of boxes of pen = p
number of boxes of rubber bands = r
He ordered 24 boxes of both items. Therefore,
p + r = 24...............(i)
The total cost of what he ordered is $200 . Therefore,
10p + 5r = 200.......(ii)
combine the equations
p + r = 24...............(i)
10p + 5r = 200.......(ii)
from equation (i)
p = 24 - r
insert the value of p in equation (ii)
10(24 - r) + 5r = 200
240 - 10r + 5r = 200
240 - 200 = 5r
40 = 5r
divide both sides by 5
r = 40/5
r = 8
insert the value of r in equation(i)
p + 8 = 24
p = 24 - 8
p = 16
number of box of pen = 16
number of box of ribbon bands = 8
