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What is the number of a two digit number that is four times the sum of its digits The tens digit is 3 less than the units digit?
Wiki User
∙ 15y ago
36 [1] b − 3 = a
[2] 4(a + b) = 10a + b
[3] 4a + 4b = 10a + b
Substitute [1] (b − 3) for a in [3]:
[4] 4(b − 3) + 4b = 10(b − 3) + b
[5] 4b − 12 +4b = 10b − 30 + b
[6] 18 = 3b
[7] 6 = b
[8] 3 = a
Wiki User
∙ 15y ago
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Im a 2-digit number the sum of your digits is 6 my units digit is two times my tens digit what am i?
-4
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