Question

If 16x-2=30 what is the value of 8x-4?

Answer 1

12 is the value of 8x-4 when 16x-2=30
16x - 2 = 30
+ 2 +2
16x = 32 , x=2
Substitute :
8x - 4 = 8(2) - 4 = 16-4 = 12!

Answer 2

12

General Formulas and Concepts:

Pre-Algebra

• Order of Operations: BPEMDAS
• Equality Properties

Explanation:

Step 1: Define 1st equation

16x - 2 = 30

Step 2: Solve for x

1. Add 2 on both sides: 16x = 32
2. Divide 16 on both sides: x = 2

Step 3: Solve equation

1. Define: 8x - 4
2. Substitute: 8(2) - 4
3. Multiply: 16 - 4
4. Subtract: 12

And we have our final answer!