What is the value of the expression 3 + 4 × (2 - 1)?

To find the value of the expression 3 + 4 × (2 - 1), it is essential to follow the order of operations, which is often remembered by the acronym PEMDAS (Parentheses, Exponents, Multiplication and Division from left to right, Addition and Subtraction from left to right).

1. Parentheses: First, evaluate the expression inside the parentheses. Here, (2 - 1) equals 1.

2. Multiplication: Next, multiply the result by 4. So we have 4 × 1, which equals 4.

3. Addition: Finally, add this product to 3. Therefore, 3 + 4 equals 7.

Thus, the value of the expression 3 + 4 × (2 - 1) is 7, confirming that the answer is indeed correct. The process of evaluating parentheses first, followed by multiplication, and concluding with addition ensures that the expression is calculated accurately according to mathematical conventions.