For every positive 2-digit number, , with tens digit and units digit , let be the 2-digit number formed by reversing the digits of . Which of the following expressions is equivalent to ?
F.
G.
H.
J.
K. 0
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According to Question,
x = 10t + u
and therefore,
y = 10u + t
So,
x - y
= (10t + u) - (10u + t)
= 10t + u - 10u - t
= 9t - 9u
= 9(t - u) [ Taking 9 as common ]
Thus,
x - y = 9(t - u)