Please help me with the following question:

Question

A student attempts to solve for c in the equation below. Which statement best applies to the work shown below?

3c + 6 - 4c - 12c = 7

-13c + 6 = 7

-13c + 6 + (-6) = 7 + (-6)

-13c = 1

c = -1/13

A. The student followed all rules correctly and solved for c.

B. In step 2 of the student’s work they made a mathematical error.

C. The student’s answer is negative but it should be positive.

D. The student combined like terms incorrectly in step 1.

I think the answer is mostly A. I also think the answer is C. Is A the correct answer?

Please help me by checking my answer. Any help will be greatly appreciated! :)

Answer 1

The answer the student has is correct.

c = -1/13

The correct answer is A

The answer is negative.

Answer 2

A is correct.

Answer 3

Thank you Don and Ms. Sue!! :)

Answer 4

You are welcome.