8(w - 1) + 13 - 7w = 9 please, I need help, I need a simple explanation and step by step answer, I'm struggling

7(x - 2) = 3(x + 4) solve the following equation. then enter your answer in the space provided using mixed number format.

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

D. in a discrete probability distribution, the sum of the probabilities for the discrete variables will be > 1. true or false