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July 29, 2014

July 29, 2014

Posted by **Anonymous** on Saturday, February 19, 2011 at 9:26pm.

- math algebra -
**Reiny**, Saturday, February 19, 2011 at 10:12pmlength --- x

width ---- x/3 + 3

x(x/3 + 3) = 120

x^2/3 + 3x - 120 = 0

x^2 + 9x - 360 = 0

(x-15)(x+24) = 0

x = 15 or x = -24, but x > 0

the length is 15

width = 15/3 + 3 or 8

check (8)(15) = 120

3 more than 1/3 of 15 gives us 8

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