How many solutions does the equation have? 5(w−1)−2=5w+7a.0 b.1 c. infinitely many

Does anyone know how to do geometryme with this problem

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?

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