Question 992333
The sum of two numbers is equal to 31. The smaller is doubled. The larger is decreased by 11. The resulting numbers are equal. What is the number? 
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Equations:
x + y = 31
(2x)= (y-11)
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Substitute for "x" and solve for "y"::
(2(31-y)) = y-11
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62-2y = y-11
3y = 73
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y = 26 1/2
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x = 31- 26 1/2 = 4.5
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Cheers,
Stan H.
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