Question

The total cost of 8 books and 5 pens
is 420 rupeas and the total cost of 5
books and 8 pens is 321 rupees
the cost of 1 book and a 2 pens.
​

Answer 1

Answer:

8x +5y =420

5x +8y =321

solve equ and find the value of x and y, where x is cost of one book and y is a cost of one pen

Answer 2

Answer:

Let the cost of one book be Rs x and the cost of one pen be Rs y. According to the first condition, the total cost of 8 books and 5 pens is Rs 420. According to the second condition, the total cost of 5 books and 8 pens is Rs 321. ∴ The cost of 1 book and 2 pens is Rs 69

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