# Maths

Algebra Level 2

For every positive 2-digit number, $$x$$, with tens digit $$t$$ and units digit $$u$$, let $$y$$ be the 2-digit number formed by reversing the digits of $$x$$. Which of the following expressions is equivalent to $$x-y$$?

F. $$9(t-u)$$
G. $$9(u-t)$$
H. $$9t - u$$
J. $$9u - t$$
K. 0

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