A privacy-conscious worked example with the original question, step-by-step reasoning, common traps, and similar practice.
Guided solution
To find Sandra's age, we need to follow the order of operations: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).
The problem requires understanding and applying the order of operations, which is a fundamental concept but can be tricky for students who are not yet comfortable with it.
Using the order of operations, first divide, then multiply, and finally subtract to find Sandra's age.
