On the windowsill is a plant that is 15 centimeters tall. It is growing 6 centimeters per week. A second plant, which is 51 centimeters tall, is on the coffee table. It is growing 3
centimeters per week. Eventually the two plants will be the same height. How tall will the
plants be? How many weeks will that take?
Each plant will be
centimeters tall after
weeks.