Which of the following statements is true?
Alice is correct.
The 6 should be 30 in step two.
The 6 should be -6 in step two.
The 6 should be -4 in step two.
The answer is B. The 6 should be 30 in step two because to get rid of the -18, you must add 18 on both sides. And when you add 18 to 12, you will result in the answer: 30. This proves that answer B is correct.
