Question

The average of 5, 10, 15, and z is 20. What is z?

Answer 1

z is 20

Explanation:

Answer 2

50

Explanation:

Step 1:

5 + 10 + 15 + z / 4 = 20 Equation

Step 2:

30 + z / 4 = 20 Combine Like Terms

Step 3:

30 + z = 20 × 4 Multiply 4 on both sides

Step 4:

z = 80 - 30 Subtract 30 on both sides

Answer:

z = 50

Hope This Helps :)