Posted by **Johanna** on Thursday, September 13, 2007 at 3:50pm.

Hello, I need help for my 5th grader...Solve the problem by working backward. Write the ans. in a compl. sentence. Mara followed a recipe she found on the net to make her own perfume. She started by adding jojoba oil to a small bottle. Then she added 2 1/3ozs of sandalwood oil, 1 1/4ozs of musk oil, and 1 5/12ozs of frankincense oil. Mara made a total of 8ozs of perfume. How much jojoba oil did she use?

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