Question

The total cost of 6 book and 4 pencil is 34 and that of five books and 5 pencil rupees 30 the cost of each books and its pencil in Rupees respectively in

Answer 1

Answer:

Cost of books: Rs. 5, Cost of pencils:Rs.1

Step-by-step explanation:

Let cost of books=x, cost of pencils=y

6x + 4y = 34 →A

5x + 5y = 30 →B

A*5:

30x + 20y = 170 →C

B*4:

20x + 20y = 120 →D

C-D:

30x + 20y - 20x - 20y = 170-120

10x = 50

x=50/10 = 5

6*5+4y=34

30+4y=34

4y=4

y=1

Hence x=5, y=1