BONUS QUESTION:
In a container of beans, there are black, white, and brown beans. The ratio of black to brown is 4 to 9.There are twice as many white as there are black. If there are 16 white beans in the container, how many beans are there in all?
brown, 9 x
black, 4 x
white, 8 x = 16
so x = 2
18 + 8 + 16