Question

Mrs Ng bought 40 pears and apples. Each pear cost $0.90 and each apple cost $0.70. The
total cost of all the pears was $12 more than the total cost of all the apples. How many
pears did Mrs Ng buy?

Answer 1

Answer:

Step-by-step explanation:

Number of apple=$24/$0.70

Answer 2

Answer:

This can be solved by creating a system of two linear equations in two variables.

Let  x  be the number of apples and  y  be the number of pears. Given that a total of 15 items were purchased, we get  x+y=15 . That’s one equation.

We know that the cost of an apple is Rs. 6 and that of a pear is Rs. 9 (three more than the apple). This means that the total cost of apples  6x  and the total cost of pears  9y  add up to Rs. 111. This gives us our second equation:  6x+9y=111 . It’s worth it to take some time and ensure you know how we came to this equation.

Once you’ve modeled your problem, solving this s … (more)

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