Answer:
A. Step 1
Explanation:
I did it on khan so its right
Step one is not correct. He got 12. He should have obtained 10 -2 = 8. You need to subtract 2 on the left to get rid of the 2 there. So you must subtract 2 on the right.
Answer: Step one contains the error.
1.6m questions
2.0m answers