Richard went shopping and bought a pen, a book and a magazine. The magazine cost ¼ of a book. The pen cost 1/3 of the magazine. If he spent 734.40 pesos, how much did he spend for the pen?

Answer 1

b + p + m = 734.4

m = b / 4 ... b = 4 m

p = m / 3 ... m = 3 p ... b = 12 p

substitute to find the solution

Answer 2

Spent X pesos for the book.
Spent x/4 pesos for the magazine.
Spent 1/3 * x/4 = x/12 pesos for the pen.

x + x/4 + x/12 = 734.40,
Multiply both sides 12:
12x + 3x + x = 8812.8,
X = ?