Supermarket A sells 50 oranges and 120 mangoes for 4000. Supermarket B sells 84 oranges and 140 mangoes for 4816. Find the price of an orange and a mango.

Okay, I will help you complete this problem. I will continue from your work in part (b) and then solve parts (c) and (d).

Assumption: I will use the two equations you provided in part (a) and started solving in part (b):

1. $50x + 120y = 4000$
2. $84x + 140y = 4816$

b) Find the price of an orange and a mango from supermarket A

Step 1: Multiply the first equation by 84 and the second equation by 50 to eliminate $x$.
From equation (1):

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