SOLUTION: The sum of 3 number is 38. The second number is nine more than double the first, and the third number is one less than double the first.

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Question 738104: The sum of 3 number is 38. The second number is nine more than double the first, and the third number is one less than double the first.
Answer by stanbon(75887) About Me  (Show Source):
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The sum of 3 number is 38. The second number is nine more than double the first, and the third number is one less than double the first.
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Equations:
a + b + c = 38
b = 2a + 9
c = 2a-1
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Substitute for "b" and for "c" and solve for "a":
a + (2a+9)+(2a-1) = 38
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5a + 8 = 38
5a = 30
a = 6
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b = 2a+9 = 12+9 = 21
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c = 2a-1 = 12-1 = 11
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Cheers,
Stan H.
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