In your laundry soap recipe, the ratio of borax to washing soda to soap flakes is 2:2:1. This means that for every 1 part of soap flakes, you have 2 parts of borax and 2 parts of washing soda.
If you are using 7 cups of soap flakes, you will need:
- Borax: 2 parts = 2 * 7 cups = 14 cups
- Washing Soda: 2 parts = 2 * 7 cups = 14 cups
So, you will need 14 cups of borax and 14 cups of washing soda to combine with the 7 cups of soap flakes.