Question

Which of the following describes the correct process for solving the equation 2x − 4 = 20 and arrives at the correct solution?

Add 4 to both sides, and then divide by 2. The solution is x = 12.
Divide both sides by −4, and then subtract 2. The solution is x = −7.
Subtract 4 from both sides, and then divide by 2. The solution is x = −12.
Multiply both sides by −4, and then divide by 2. The solution is x = −40.

Answer 1

Answer:5

Step-by-step explanation:

Answer 2

Answer:

Option (A)

Add 4 to both sides, and then divide by 2. The solution is x=12

Explanation:

Add 4 to both sides, and then divide by 2. The solution is x=12

Step I: Add 4 to both sides

Adding, 2x – 4 + 4 = 20 + 4

2x = 24

Step II: Divide by 2

x = 12

Therefore, solution is x = 12

Hence, option (a) is correct