The options are:
A. Incorrect. She needed to add 100 to both sides instead of subtracting 100.
B. Incorrect. She needed to multiply both sides by –2 first, then subtract 100
C. Correct. She could have also subtracted 100 from both sides, then divided by -2
D. Correct. She could have also multiplied both sides by –2 first, then subtracted 100.
Answer:
C. Correct. She could have also subtracted 100 from both sides, then divided by -2
Step-by-step explanation:
Given
Required
Describe the accuracy in her work
First, she needed to subtract 100 from both sides
Then multiply through by -2
<em>Hence, option (c) is correct.</em>