It takes 12 minutes to fill an entire bathtub using both the cold and hot water. if just the cold water is used, it takes 18 minutes to fill the bathtub. how long would it take to fill the bathtub if just the hot water were used?
Answer: The equation would be (12/18)+12r=1. The hot water can fill 1/36 of the tub in 1 minute. It would take 36 minutes for the hot water to fill the bathtub.
