Mathematics, 27.05.2021 21:10 sauloro06
A number is doubled and then increased by seven. The result is seventy-one. What is the original number?
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How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution?
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A number is doubled and then increased by seven. The result is seventy-one. What is the original num...
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