Two purchase combinations of two items: price of an item

This type of question, asked 2 times: 7 Mar 2023 Tier II, 26 Oct 2023 Tier II. All 2 questions below, oldest first.

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Question 1
7 Mar 2023 Tier II
9 $If two LED TVs and one mobile phone cost ₹31,000, while two mobile phones and one LED TV cost ₹35,000, then the value of one mobile phone is:$
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Question 2
26 Oct 2023 Tier II
20 $The cost of 2 pencils and 3 pens is ₹55 and the cost of 7 pencils and 2 pens is ₹65. What is the total price (in ₹) of one pen and one pencil?$
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