3x - 4/5 = 7/12 help me with this question

Which of the following expressions are equivalent ?

The weight of full–grown tomatoes at a farm is modeled by a normal distribution with a standard deviation of 18.4 grams. the 95 percent confidence interval for the mean weight of the tomatoes is calculated using a sample of 100 tomatoes. what is the margin of error (half the width of the confidence interval)?

Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have