Question

Find the counterexample to this statement: If xy = 0, then y must be equal to 0.

Answer 1

If xy = 0 then x must be equal to 0 is the counterexample. Basically, one of the variables has to equal zero.

Answer 2

the answer above is not correct
a counter-example demonstrates that the sentence is false
according to the statement we have that
xy=0 -> y=0
so are there any cases, values for x and y (with y not =0), such that xy=0?
find a value of x that makes this statement true, that is your counterexample