Kim's teacher has marked this problem as one to recheck, but Kim cannot determine what she has done incorrectly. Identify Kim's error and write a correct solution.

Question

Six less than 2 times a number is 50. What is the number?
2x – 6 = 50 (line 1)
2x – 6 – 6 = 50 – 6 (line 2)
2x = 44 (line 3)
2x ÷ 2 = 44 ÷ 2 (line 4)
x = 22 (line 5)

Answer 1

2 x - 6 = 50

The error is in line 2.

6 should be added on both sides of the equation, not subtracted.

2 x - 6 + 6 = 50 + 6

2 x = 56

x = 56 / 2

x = 28