Write a short story problem that can be solved in one step. Write an equation that represents the problem. Name the property used to solve the problem, and then solve the problem.

Story problem:

Maria has 7 apples. She gives her friend Juan 3 apples. How many apples does Maria have left?

Equation:
Maria's remaining apples = Maria's initial apples - Apples given to Juan

Property used to solve the problem: Subtraction property of equality

Solution:
Maria's remaining apples = 7 - 3
= 4

Therefore, Maria has 4 apples left.