The answer is
In order to determine the answer, we have to know that it means "solution".
In any expression where there is a variable, we can replace any value in the variable and we get a result. When we replace a value that it makes the expression equal to zero, that value is called "solution".
So in this case, we have to find a solution for "m":
Finally, the solution is only one and it is 8.
There is only one solution.
7(8)=56. It cannot be anything else.
Let me know if this helps :)
7m and m = 8
7(8) = 56 one solution and that solution is 56
7m (or 7 × 8 according to the proble) only has one solution and it is 56.