SOLUTION: The tens digit of a two-digit number is 1 more than three times the units digit. If the sum of the digits is 9, find the number.
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Question 1061157: The tens digit of a two-digit number is 1 more than three times the units digit. If the sum of the digits is 9, find the number.
Answer by math_helper(2461) (Show Source): You can put this solution on YOUR website!
Tens digit is 'a'
Ones digit is 'b'
(1)
(2)
Substitute right hand side of (1) for 'a' in (2):
—from eq(1)—>
—
Ans: The number is 72
—
Check (using eq(2)): 3*2+1 = 7 (ok)
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