Final answer:
To show that the equation ax=b does not have a solution for all possible b for which ax=b does have a solution, we can use a counterexample.
Step-by-step explanation:
To show that the equation ax=b does not have a solution for all possible b for which ax=b does have a solution, we can use a counterexample.
Let's consider the equation 2x=4. This equation has a solution, which is x=2.
However, if we try to solve the equation 2x=b, we can see that there is no single value of x that will satisfy this equation for all possible values of b. Therefore, we have shown that there are cases where ax=b has a solution, but not for all possible values of b.