Lenny is making his own laundry soap. The recipe calls for 2 parts borax, 2 parts washing soda, and 1 part soap flakes it Lenny uses 7 cups of soap flakes, how many cups of borax and washing soda combined does he need? (1 point)

Answer 1

Since the recipe calls for 1 part soap flakes, and Lenny is using 7 cups of soap flakes, the total number of parts in the recipe is 2 + 2 + 1 = 5 parts.
To find the total number of cups of borax and washing soda combined, we need to find the number of parts that represent 7 cups of soap flakes.
Each part represents 7/1 = <<7/1=7>>7 cups of soap flakes.
Therefore, Lenny needs 2 parts of borax, which is 2 * 7 = <<2*7=14>>14 cups of borax.
And he needs 2 parts of washing soda, which is 2 * 7 = <<2*7=14>>14 cups of washing soda.
Therefore, Lenny needs a total of 14 + 14 = <<14+14=28>>28 cups of borax and washing soda combined. Answer: \boxed{28}.