If x + 5 = 10, what is x?

To solve the equation x + 5 = 10, you need to isolate the variable x. This can be done by subtracting 5 from both sides of the equation.

Starting with the original equation:

x + 5 = 10

Now, subtract 5 from both sides:

x + 5 - 5 = 10 - 5

This simplifies to:

x = 5

Thus, the value of x is determined to be 5, which corresponds to the selected answer. This shows that when you find x, it satisfies the original equation, making it the correct choice.