If the cost of 9 books is 135. Find the cost of 1 book?
Answers
Answered by
7
Answer:
cost of 9 books is 135
therefore cost of 1 book is=135 /9=15
cost of 1 book is ₹15.
Answered by
5
Let say price of one book is X, and price of one pen is Y.
2X+3Y =225
3x+4Y= 320
By multiplying 3 in equation 1 and multiplying 2 in equation 2
6X+9Y =675
6X +8Y = 640
So by elimination method Y is equal to 35.
The cost the cost of one pen is 35 rupees
Similar questions