Question

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 1

x = 16

Explanation:

Subtract 100 from both sides: -1/2x=-8 Then multiply by -2 as they said: 1x=-16. It is now clear what x is. 1 times negative 16 is negative 16. Accuracy: 97%