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15-09-2015
Mathematics

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39 less than twice a number is 5 times the sum of a number and two times the number. Find the number

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16-09-2015

[tex]2n - 39 = 5(n + 2n)\\2n - 39 = 5(3n)\\2n - 39 = 15n\\2n = 15n + 39\\-13n = 39\\\\n = -3[/tex]

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