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18-05-2016
Mathematics

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The area of a pentagon increased by 27 is the same as four times the area of the pentagon, minus 15. What is the area of the pentagon?

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Аноним Аноним

18-05-2016

equation
a + 27 = 4a - 15
3a - 15 = 27
3a = 42
a = 14

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