Answer:
a = 5
General Formulas and Concepts:
Order of Operations: BPEMDAS
Properties: Distributive, etc.
Step-by-step explanation:
Step 1: Write equation
3(a + 3) + 6 = 30
Step 2: Solve for a
- Distribute 3: 3a + 9 + 6 = 30
- Combine like terms: 3a + 15 = 30
- Subtract 15 on both sides: 3a = 15
- Divide 3 on both sides: a = 5
Step 3: Check
Plug in a to verify it's a solution.
- Substitute: 3(5 + 3) + 6 = 30
- Add: 3(8) + 6 = 30
- Multiply: 24 + 6 = 30
- Add: 30 = 30
