As a S4 student, help Musa and Menge find out the price of an exercise book and a textbook in Kampala Modern Bookshop.

Item 1:

a) As a S4 student, help Musa and Menge find out the price of an exercise book and a textbook in Kampala Modern Bookshop.

Let $t_K$ be the cost of a textbook in Kampala Modern Bookshop.
Let $e_K$ be the cost of an exercise book in Kampala Modern Bookshop.

From the problem statement:
Musa bought 25 textbooks and 35 exercise books for 135,000.

$$25t_K + 35e_K = 135,000 \quad (1)$$

Dividing Equation (1) by 5:

$$$$