SOLUTION: if 7 times a 2 digit number is equal to 4 times the number obtained by reversing the oder of the digit. the sum of the digits is 3. find the number ?

Question 448958: if 7 times a 2 digit number is equal to 4 times the number obtained by reversing the oder of the digit. the sum of the digits is 3. find the number ?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
if 7 times a 2 digit number is equal to 4 times the number obtained by reversing the order of the digit. the sum of the digits is 3. find the number ?
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Let the number be 10t+u
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Equation:
t+u = 3
7(10t+u) = 4(10u+t)
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Substitute for "t" and solve for "u":
7(10(3-u)+u) = 40u+4(3-u)
----
7(30-9u) = 40u+12-4u
210-63u = 36u+12
99u = 198
u = 2
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Solve for "t":
t+u = 3
t+2 = 3
t = 1
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The number is 10t+u = 12
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Cheers,
Stan H.
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