Let's begin by listing out the information given to us:
Tween refers to a child aged 10-14 years
The difference between a tween (y) and a child aged 3-5 years (x) is 610 minutes
How much screen time does the average tween (y) have is gotten by making y the subject of the equation. We have:
The screen time of the average tween is y = 610 + x