So you have to isolate x. First, move the 8 over, so it looks like: x/2=-12-8 Then to get rid of the 2 on the left hand side, you go: x=-12-8 x2 x=-20x2 x=-40. I think.
First subtract 8 from both sides leaving you with x/2 = -20 Then multiply both sides by two to get rid of the denominator which leaves you with x = -40
This isn't the best worded question but from what I understand a larger sample size decreases the margin of error. If he would like a more accurate answer a larger sample size of the viewers will give more accurate answers.
