Question

Below is the work a student completed with an error. Identify the step where the error first occured an

Step 1: (7 - 10) – 2(6y - 5) + 17
Step 2: (3) - 12y – 5 + 17
Step 3:3 - 12y + 12
Step 4: - 12y + 15
А
Step 2
B
Step 3
C
Step 4
D
Answer should be 12y - 9
E
Answer should be 12y + 9
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TM

Answer 1

Step 2

Explanation:

Solving

• (7 - 10) - 2(6y - 5) + 17 [Step 1]
• 3 - 12y + 10 + 18 [Step 2]
• 3 - 12y + 28 [Step 3]
• -12y + 31 [Step 4]

The error has occurred in Step 2.

The distribution of -2 to 6y and -5 gives -12y and 10 respectively.

Instead, the distribution has not happened between -2 and -5.