Final answer:
In mathematics, when an equation solution is all real numbers, it means that there are an infinite number of solutions.
Step-by-step explanation:
In mathematics, when an equation solution is all real numbers, it means that there are an infinite number of solutions. This is because any real number can be substituted into the equation to make it true. For example, in the equation x + 3 = x - 2, if we substitute any real number for x, the equation will be true. Therefore, the equation has an infinite number of solutions.