SOLUTION: The tens digit of a certain two digit number eceeds the unitsdi git by 4 and is 1 less than twice the ones digit. Find the number.

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Question 1166410: The tens digit of a certain two digit number eceeds the unitsdi git by 4 and is 1 less than twice the ones digit. Find the number.
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39621) About Me  (Show Source):
You can put this solution on YOUR website!
For the Tens digit t and Ones digit u, the description is system%28t-u=4%2Ct=2u-1%29. Easy to solve.

The Number: 95

Answer by ikleyn(52817) About Me  (Show Source):
You can put this solution on YOUR website!
.

Let t be the tens digit and u be the ones digit.


Then from the condition, we have two independent equations

    t - u = 4    (1)

    t = 2u - 1   (2)


Substitute t from (2) into (1).  You will get

    (2u-1) - u = 4,   or

     u         = 5.


Then from equation (2),  t = 2*5-1 = 9.


ANSWER.  The number is  95.

Solved.