Question

-9=2(18)+9y how do you work it out

Answer 1

y = -5

General Formulas and Concepts:

Pre-Alg

• Order of Operations: BPEMDAS
• Equality Properties

Explanation:

Step 1: Define equation

-9 = 2(18) + 9y

Step 2: Solve for y

1. Multiply: -9 = 36 + 9y
2. Subtract 36 on both sides: -45 = 9y
3. Divide both sides by 9: -5 = y
4. Rewrite: y = -5

Step 3: Check

Plug in y to verify it's a solution.

1. Substitute: -9 = 2(18) + 9(-5)
2. Multiply: -9 = 36 - 45
3. Subtract: -9 = -9