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05-11-2015
Mathematics

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twice a number is increased by one-third the same number. The result is 42. Find the number

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XQueenX XQueenX

05-11-2015

x - the unknown number.

[tex]2x + \frac{1}{3} *x = 42 \\ \frac{6}{3} *x + \frac{1}{3} *x = 42 \\ \frac{7}{3} *x = 42 \\ x = 42 : \frac{7}{3} \\ x = 42 * \frac{3}{7} \\ x = \frac{126}{7} \\ x= 18[/tex]

x = 18.

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