Question 1121545
x+y+z=300
y=(1/2)z
(2/3)x=3y=(z+40)
(2/3)x=(3/2)z=z+40
can solve for z
(1/2)z=40
z=80 pens
y=40 pens
(2/3)x=120 pens, x=180 pens  (180, 40, 80)
Now they each have 120 pens, and the total is 360 pens. (120, 120, 120)