Problema Solution
the units digit of a two-digit number is 4 less than the tens digit. the number is 12 more than six times the sum of the digits. find the number.
Answer provided by our tutors
x = 10s digit
y = units digit
y = x-4
(10x + y) = 12+ 6(x+y)
10x + x-4 = 12 + 6x + 6x -24
11x -4 = -12 + 12x
8 = x
y = 4
The number is 84