Question

Lenny is making own laundry soap. The recipe calls for 2 parts borax, 2 parts washing soda, and 1 part flakes. If Lenny uses 7 cups of soap flakes, ow many cups of borax and washing soda combined does he need?

7 cups

21 cups

14 cups

28 cups

Answer 1

In the recipe, the proportions for the ingredients are as follows: 2 parts borax, 2 parts washing soda, and 1 part flakes.

Let's denote the parts:
- Borax = 2 parts
- Washing soda = 2 parts
- Soap flakes = 1 part

Lenny is using 7 cups of soap flakes, which corresponds to 1 part. Therefore, we can find the total number of parts in the recipe:

- Total parts = 2 (borax) + 2 (washing soda) + 1 (flakes) = 5 parts.

Since 1 part is equal to 7 cups (the amount of flakes Lenny used), we can calculate the amount for the other ingredients:

1 part = 7 cups

Now we can calculate the amounts for borax and washing soda:

- Borax = 2 parts = 2 * 7 cups = 14 cups
- Washing soda = 2 parts = 2 * 7 cups = 14 cups

Now, we need the combined amount of borax and washing soda:

Combined amount = Borax + Washing Soda = 14 cups + 14 cups = 28 cups.

Thus, Lenny needs **28 cups** of borax and washing soda combined.