the price of 3 accounting books and 5 business mathematics books is₹800 and that of 6 accounting books and 3 business mathematics books is₹900 find the cost of an accounting book and a business mathematics books
Answers
Answer:
price of one accounting book is₹900
price of business mathematics is₹800
Step-by-step explanation:
1 accounting book =₹100
=100×9=₹900
1 business mathematics book=₹100
=100×8=₹800
Answer:
The cost of an accounting book = Rs. 100
The cost of a business mathematics book = Rs. 100
Step-by-step explanation:
Let x be the cost of an accounting book and y be the cost of a business mathematics book
Since the cost of 3 accounting books and 5 business mathematics books is₹800, we have
3x + 5y = 800 ------------------(1)
Since the cost 6 accounting books and 3 business mathematics books is ₹900, we have
6x + 3y = 900 -------------------------(2)
(1)×2 → 6x + 10y = 1600 ----------------(3)
(3) - (2) → 3y - 10y = 900 - 1600
-7y = -700
y = 100
Substituting the value of y = 100 in equation (1)
3x+500 = 800
3x = 800 - 500 = 300
x = 100
The cost of an accounting book = Rs. 100
The cost of a business mathematics book = Rs. 100
#SPJ2