
Hi there!
kindly help with this question without algebra.
thanks in advance 😀
Hi there!
kindly help with this question without algebra.
thanks in advance 😀
1 File - 1 Pen = 2.75 9 Files - 9 Pens = 9 x 2.75 = 24.75 If we buy 9 Pens, we have $24.75 left. That amount can buy 14 - 9 = 5 Pens. So 1 Pen = 24.75/5 = $4.95. Thus 9 Files = 14 Pens = 14 x 4.95 = $69.30. Check: 1 File = 69.30/9 = $7.70 1 File - 1 Pen = 7.70 - 4.95 = $2.75
9F = 14P
9F – 14P = 0 … (1)
F – P = 2.75
9F – 9P = 24.75 … (2)
(2) – (1):
5P = 24.75
P = 4.95
So 9F = 14*4.95 = Â $69.30 #