Question

For all rational numbers x and y, x – y = y – x. True or False? Why?

Answer 1

x-y is not equal to y-x. The statement 'x-y=y-x' is false because there is no commutative property in subtraction. Also, let us take x=5 and y=3. Then,
5-3=3-5
2=-2
Everyone knows that 2 is not equal to -2. Thus x-y is not equal to y-x.