Question

Callie solved this one-variable equation. When she was done, she tried to verify her answer, but found that it was wrong. Can you find her mistake?

1/2 (4k+8)=10

1. 2k+16=10

2. 2k=-6

3. k=3

What was Callie’s mistake?

A:Callie should have added 10 to both sides in step 2.

B:In step 1, when Callie distributed the 1/2 to the 8, she multiplied incorrectly.

C:Callie divided by 2 instead of multiplying by 2 in step 3.

D:Callie should have added 16 to both sides in step 2.

Answer 1

Answer: The answer is B :)

Step-by-step explanation: I got the answer right on Edge! Hope this helps.

Answer 2

It would be answer choice B.

Correct work shown below:

1/2(4K+8) = 10

2k + 4 = 10

2k = 6

k = 3