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?

Question

Elliot Stark

16 November, 18:46

+4

Answers (1)

Know the Answer?

Yandel Osborne · Answer 1

Step two he said 2 (3x-4) is 5x-6 when he added when he should have used multiplication to solve this part making the correct step 6x-8

The work of a student to solve the equation2 (3x - 4) = 8 + 2x + 4 is shown below:Step 1: 2 (3x - 4) = 8 + 2x + 4Step 2: 5x - 6 = 12 + 2xStep 3: 5x - 2x = 12 + 6Step 4: 3x = 18Step 5: x = 6In which step did the student first make an error and what is the correct step?