Oscar sold 2 glasses of milk for each 5 sodas he sold. If he sold 10 glasses of milk, how many sodas did he sell?
Set up a proportion along with milk/soda = 2/5 = 10x. Cross multiply and solve; (5)(10) = 2x. Divide both sides by 2; 50/2 = 2x/2 ;x = 25 sodas.