Trail mix R contains 10% nuts, trail mix S contains 20% nuts, and trail mix T contains 18% nuts. If grams of trail mix R,
grams of trail mix S, and
grams of trail mix T are combined to give
grams of trail mix that contain 15% nuts, what is
in terms of
and
?
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数学PS
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A
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B
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C
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D
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E
显示答案
正确答案: C