PL HELP URGENTLY!Explain the Error Find the error in the solution, and then solve it correctly.

7x + 21 + 9x = 2

7x + 21 = -7

7x = -28

-28

X =

7

(select) was subtracted from the left side, but (select) was subtracted from the

right side. The Subtraction Property of Equality states that you can subtract the

same number from each side and the equation will remain true. But 9x and 9 are

not the same number (unless x is (select)).

x =

(co 3) the soup produced by a company has a salt level that is normally distributed with a mean of 5.4 grams and a standard deviation of 0.3 grams. the company takes readings of every 10th bar off the production line. the reading points are 5.8, 5.9, 4.9, 6.5, 5.0, 4.9, 6.2, 5.1, 5.7, 6.1. is the process in control or out of control and why? it is out of control as two of these data points are more than 2 standard deviations from the mean it is in control as the data points more than 2 standard deviations from the mean are far apart it is out of control as one of these data points is more than 3 standard deviations from the mean it is in control as the values jump above and below the mean