Question 580336: a two-digit number is four times the sum of its digits.the ones digit is 4 more than the tens digit. fine the original number Answer by dfrazzetto(283) (Show Source):
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number of the form: xy
y = 4+x
x4+x = 4(x + y); use intuition, list possible numbers of the form x4x
15
26
37
48
48 is the answer 4(4+8) = 4*12 = 48
