Question

Solve y = −23(x + 9) + 4 for x when y = 0.

Answer 1

-203

Explanation:

remove the 0 ( when adding or substracting 0, the quantity does not change

y=-23 (9+4)

Multiply the numbers -23x9

y= =207+4

Calculate the sum

y= -207+4

Which = -203

Answer 2

x = -203/23

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

Equality Properties

• Multiplication Property of Equality
• Division Property of Equality
• Addition Property of Equality
• Subtraction Property of Equality

Explanation:

Step 1: Define

Identify

y = -23(x + 9) + 4

y = 0

Step 2: Solve for x

1. Substitute in y: 0 = -23(x + 9) + 4
2. [Subtraction Property of Equality] Subtract 4 on both sides: -4 = -23(x + 9)
3. [Division Property of Equality] Divide -23 on both sides: 4/23 = x + 9
4. [Subtraction Property of Equality] Subtract 9 on both sides: -203/23 = x
5. Rewrite: x = -203/23