For every positive 2-digit number, a, with units digit x and tens digit y, let b be

Question:

For every positive 2-digit number, a, with units digit x and tens digit y, let b be the 2-digit number formed by reversing the digits of a. Which of the following expressions is equivalent to a − b?
F. 0
G. 9x − y
H. 9y − x
J. 9(x − y)
K. 9(y − x)

Fantastic news! We've Found the answer you've been seeking!