How many distinct real solutions are there to the equation:
If a, b, and c are distinct numbers, how many solutions are there to the following equation?
How many solutions are there to satisfy the equation: ABC+BCD=CBA where each letter represents one digit?
How many integer solutions are there to the system of equations below and which are those solutions?
x^2+y-z = 42 x+y^2-z = 18