You mix soda water, fruit punch concentrate, and ginger ale in the ratio of

1 : 2 : 5 to make fruit punch. How many pints of each ingredient should you use to make 4 gallons of fruit punch?

1 answer

4 gallons = 32 pints
So, if there are x pints of soda, then
x + 2x + 5x = 32
find x, and then the rest.