Write & solve an algebraic equation for each problem, using x as the variable. Show a picture of your work at the bottom of the slide. 49. 50. A telephone plan costs $0.25 per There were 640 gallongs of water minute plus a one-time service in a 1600-gallon pool. Water is charge of $0.75. If the total bill is being pumped into the pool at a $5.00, find how many minutes you rate of 320 gallons per hour. Find talked. how many hours it will take to fill the pool. Equation: Equation: Solution: Solution: x= minutes x= hours