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Mathematics, 20.07.2019 20:00 dontcareanyonemo

The square of mark's age 3 years ago is 6 times the age he will be in 9 years. what is his age now? 9 12 15

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The square of mark's age 3 years ago is 6 times the age he will be in 9 years. what is his age now?...
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