Question
One durian cost 2 times as much as one mangosteen. Mrs Zhang bought 3 durians and 4 mangosteens for $28.60. How much would 9 durians and 11 mangosteens cost? Express the answers to 2 decimal places.
3 m

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One durian cost 2 times as much as one mangosteen. Mrs Zhang bought 3 durians and 4 mangosteens for $28.60. How much would 9 durians and 11 mangosteens cost? Express the answers to 2 decimal places.