The water level in a tank measures 15 inches and is decreasing 0.5 inches every minute. How many minutes, x, will it take for the water level to measure 9 inches deep?
Step-by-step explanation: This is because if you're seeing how long it takes to get from 15 inches to 9 inches, that is a difference of 6 inches. 6 / 0.5 inches per minute = 12 minutes
