Austin worked out the problem to the left and got an answer of x=7

Question

Lisa thinks he made a mistake and the answer should be x=1

Who is correct or are they both wrong? Why?

Answer 1

Without knowing the specific problem that Austin worked out, it is difficult to determine who is correct. It is possible that either Austin or Lisa made a mistake in their calculations or reasoning. The correct answer can only be determined by evaluating the problem and checking the work.