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

Eight less than 2 times a number is 40. What is the number?

2x – 8 = 40 (line 1)

2x – 8 – 8 = 40 – 8 (line 2)

2x = 32 (line 3)

2x ÷ 2 = 32 ÷ 2 (line 4)

x = 16 (line 5)

Question

Jennifer's teacher has marked this problem as one to recheck, but Jennifer cannot determine what she has done incorrectly. Identify Jennifer's error and write a correct solution.
 

Eight less than 2 times a number is 40. What is the number?

      2x – 8 = 40           (line 1)

2x – 8 – 8 = 40 – 8    (line 2)

             2x = 32          (line 3)

       2x ÷ 2 = 32 ÷ 2   (line 4)

                x = 16         (line 5)

anonymous · Answer

Reload if question marks

studygurl14 · Answer

Her error is in step 2. Instead of adding 8 to both sides to get rid of the -8, she subtracts 8 from both sides.