Everyone come in, my younger brother asked me a few questions, I didn't respond at all, help me quickly
Person A and Person B are 50 KM apart and walk towards each other, meeting in 2 hours. Walking in the same direction, A catches up with B in 12 hours. Find their speeds. A two-digit number has the sum of its tens and units digits equal to 9. Swapping the tens and units digits, the new number is 27 greater than the original. Find the original two-digit number. Students of a certain school rent 48-seat buses for a spring outing, just enough to fill all seats. Renting 64-seat buses requires one less bus than renting 48-seat buses, and also just fills all seats. Given that the rental for each 48-seat bus is 260 yuan and each 64-seat bus is 250 yuan, if only one type of bus is rented, which option saves money?
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For the second question, I did the one where the tens digit is 3 and the ones digit is 6. Setting up an equation is too troublesome, so I only did one question.
Question 1:
\Solution: Let A walk x kilometers per hour, and B walk y kilometers per hour\System of equations\2x + 2y = 50\12y + 50 = 12x
\Solution: Let A walk x kilometers per hour, and B walk y kilometers per hour\System of equations\2x + 2y = 50\12y + 50 = 12x
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