How to isolate the varible ‘x’ Show work.

-3x + 12y = 12

6x - 9y = 18

-6x + 2y = -4

6x + 3y = 3

3x - y = 4

-3x + 2y = -17

-6x + 3y = -30

7x + 6y = 16

4x - 2y = 1

16x + 5y = -2

4x - y = -2

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables