问题描述：
英语翻译
A bag of Texas Tillie's Trail Mix contains x ounces of walnuts,15 ounces of peanuts,and20 ounces of pecans.Which of the following expressions gives the fraction of the mix that is walnuts?
A bag of Texas Tillie's Trail Mix contains x ounces of walnuts,15 ounces of peanuts,and20 ounces of pecans.Which of the following expressions gives the fraction of the mix that is walnuts?
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