Question

When did Stan make his mistake.

A:Stan made a mistake in Step 1
B:Stan made a mistake in Step 3
C:Stan made a mistake in Step 5

Answer 1

Answer: Step 1

Stan made his mistake in step 1, he forgot to multiply 8 and 20. He was supposed to multiply everything in the bracket with the number outside it. If he had done it he would have gotten n + 8n + 160 = 110. Due to his mistakes the answer is wrong.

hope it helps.