The work of a student to solve the equation 2(3x − 4) = 8 + 2x + 4 is shown below:

Step 1: 2(3x − 4) = 8 + 2x + 4
Step 2: 5x − 6 = 12 + 2x
Step 3: 5x − 2x = 12 + 6
Step 4: 3x = 18
Step 5: x = 6

In which step did the student first make an error and what is the correct step?

Step 2; 6x − 6 = 2(6 + x + 2)
Step 2; 6x − 8 = 12 + 2x
Step 3; 5x − 2x = 12 − 6
Step 3; 5x + 2x = 12 + 6

Question

The work of a student to solve the equation 2(3x − 4) = 8 + 2x + 4 is shown below:

Step 1: 2(3x − 4) = 8 + 2x + 4
Step 2: 5x − 6 = 12 + 2x
Step 3: 5x − 2x = 12 + 6
Step 4: 3x = 18
Step 5: x = 6

In which step did the student first make an error and what is the correct step?

 Step 2; 6x − 6 = 2(6 + x + 2)
 Step 2; 6x − 8 = 12 + 2x
 Step 3; 5x − 2x = 12 − 6
 Step 3; 5x + 2x = 12 + 6

haseeb96 · Answer

Step 2 ; 6x-8 =12 +2x

anonymous · Answer

Step 2; 6x − 8 = 12 + 2x

here_to_help15 · Answer

http://openstudy.com/study#/updates/5536cbdce4b0f0fc37d1e797

here_to_help15 · Answer

lol today laziness hit me sorry ;)