King High School has asked Marcy to paint some murals around the school, and Marcy is thrilled! Her mural in the main office will show a ray of sunlight breaking through storm clouds. Marcy creates the perfect gray for storm clouds. There is a proportional relationship between the number of cans of black paint, x, and the number of cans of white paint, y, Marcy mixes together. The equation that models this relationship is y=2x. How much white paint would Marcy mix with 5 cans of black paint to create storm clouds? Write your answer as a whole number or decimal.