6x+14=4x+4 How do I solve this I took -4x from each side and then 2x+14=4 and then did did -4 again on each side. I then did 2x/2 and got nothing and then on the other side I got 10/2. The correct answer is -5 but I got a positive 5. What'd I do wrong?

Use the given degree of confidence and sample data to construct a confidence interval for the population mean mu . assume that the population has a normal distribution. a laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 185 milligrams with sequals 17.6 milligrams. a confidence interval of 173.8 mgless than muless than 196.2 mg is constructed for the true mean cholesterol content of all such eggs. it was assumed that the population has a normal distribution. what confidence level does this interval represent?