Question

please help me to solve this question

Answer 1

here u go friend... hope it helps

Answer 2

Cost of BOOK = 9p+3q -----Eq(1)

Cost of COPY= 4p-q --------Eq(2)

Cost of PEN  = 2p-2q -----Eq(3)

Adding Equation 1,2&3

Total Cost - 9p+3q+4p-q+2p-2q = 15p