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Mathematics, 04.11.2019 14:31 tyannamonae

For each of seven consecutive years, arsh makes a model aeroplane. the sum of the ages of the three youngest model aeroplanes is 42 years. what is the sum of the ages of the three oldest model airplanes

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For each of seven consecutive years, arsh makes a model aeroplane. the sum of the ages of the three...
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