Write an equation to describe the following: Negative forty-two is two less than four times a number.
A cleaning session for a pool in a gym lasts for 35 minutes on weekdays and 45 minutes on weekends. Suppose the time it took to clean the pool last week was 5 hours altogether. Write an equation to represent this information, and then solve it to determine how many weekday cleaning sessions there were.
Benjamin wants to join a gym in his neighborhood. It costs $20 for the first subscription plus a monthly fee of $12. If Benjamin has $152 to spend, write and solve an equation to find the number of months he can use the gym.