Question 178004
Let "x" be the total acrege.
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Equation:
acres - acres = acres
x -[(1/2)+(1/3)+(1/9)]x  = 1

x -[(9+6+2)/18]x = 1

x - (17/18)x = 1
(1/18)x = 1
x = 18 acres
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Cheers,
Stan H.