Question

John likes to watch the birds in her yard. One morning, she noticed that there are twice as many Robbins as Blue Jays. She counted 21 Blue Jays and Robin in all, how many Blue Jays did she count?

Answer 1

We can write an equation to solve this:

Let x represent amount of Blue Jays.

2x + x = 21

We can simplify the equation:

3x = 21

Divide both sides by 3 to isolate x variable:


x = 7

Therefore, 7 Blue Jays.