A 'two-digit number' is six times one less than the sum of its digits.
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Let x = tens digit and y = units digit
Then, the number can be expressed as 10x+y
So, 6(x+y) = (10x+y) - 1 and 6(x+y) = (10y+x) + 8
Simplifying, we obtain the system of equations: 4x - 5y = 1
5x - 4y = 8
Multiply the first equation by 4 and the second equation by -5: 16x - 20y = 4
-25x+ 20y = -40
Add the equations to obtain -9x = -36.
So, x = 4
4(4) -5y = 1
-5y = -15 y = 3
The number is 43.
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