Question

Find the value of y in the equation y=-4x+9 when x=-3

Answer 1

y =21
-4x-3 =12
12+9=21

Answer 2

y = 21

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

1. Brackets
2. Parenthesis
3. Exponents
4. Multiplication
5. Division
6. Addition
7. Subtraction

• Left to Right

Explanation:

Step 1: Define

Identify

y = -4x + 9

x = -3

Step 2: Evaluate

1. Substitute in x [Equation]: y = -4(-3) + 9
2. Multiply: y = 12 + 9
3. Add: y = 21