False.
From the question it is given that,
One number = x
Other number = 40 –x
Let us assume (40 – x) > x
So, 40 – x + 8 = 3 (x + 8)
48 – x = 3x + 24
– x – 3x = 24 -48
– 4x = -24
X = -24 × (-1/4)
X = 6
∴One number is x = 6
Other number is = 40 – x
= 40 – 6
= 34
Difference between numbers = 34 – 6 = 28