Answered

4.
Two exercise books and three pencils cost Ksh. 190. Five similar exercise
books and two similar pencils cost Ksh. 290. Find the cost of each exercise
book and each pencil.
for a simultaneous equation and solve it

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Answer :

mathstudent55

Answer:

A pencil costs 370/11, and an exercise book costs 490/11.

Step-by-step explanation:

Let p = cost of 1 pencil.

Let b = cost of 1 exercise book.

2b + 3p = 190

5b + 2p = 290

       -10b - 15p = -950

(+)     10b +  4p =  580

--------------------------------

                 -11p = -370

p = 370/11

2b + 3(370/11) = 190

2b = 2090/11 - 1110/11

2b = 980/11

b = 490/11

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