Create an equation by moving [color=#1551b5]both[/color] [color=#0a971e]sliders[/color]. Move so many marbles from the left glass bowl to the kangaroo that there are as many marbles as on the second glass bowl . Type the [color=#c51414]answers[/color] into the box.

1) What is the "[color=#c51414]x[/color]" called?[br]2) How do you solve the equation? What do you calculate?