Jen solved the equation 100 minus one-half x equals 92 to determine the number of questions, x, she answered incorrectly on a test. She began by subtracting 100 from both sides, then multiplying both sides by –2. Which best describes the accuracy of Jen’s work?
Answer
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 .
D
Correct. She could have also multiplied both sides by –2 first, then subtracted 100.