Question 527074: the sum of the digits of a two-digit counting number is 12 and the ratio of the units' to the tens' digitis 1 to 2. what is the number? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! the sum of the digits of a two-digit counting number is 12 and the ratio of the units' to the tens' digitis 1 to 2. what is the number?
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Let the number be 10t+u.
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Equations:
t + u = 12
u/t = 1/2
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Rearrange:
t + u = 12
t - 2u = 0
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Subtract and solve for "u":
3u = 12
u = 4
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Solve for "t":
t + u = 12
t + 4 = 12
t = 8
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Number = 10t+u = 84
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Cheers,
Stan H.
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