Question

for every two 20cm by 25cm notebooks ann orders, she orders on 12cm by 20cm notebooks the orders total 48items. How many of the larger note books did she order

Answer 1

x=20x25 notebooks, y=12x20 notebooks = x/2

x/2 + x = 48 => 3/2*x = 48 and x = 32, so 32 of 20x25 and 16 of 12x20.

Does it make sense? I think you will solve the next one yourself! :)