SOLUTION: Brand X sells 21 oz. bags of mixed nuts that contain 29% peanuts. To make their product they combine Brand A mixed nuts which contain 35% peanuts and Brand B mixed nuts which c

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Let = ounces of brand A nuts used
Let = ounces of brand B nuts used
In words:
(ounces of peanuts in final mixture)/(total ounces of mixture) = 29%


(1)
(2)
Multiply both sides of (2) by and
subtract (2) from (1)
(1)
(2)
-----------------------------


and, since




8.4 ounces of brand A and 12.6 ounces of brand B are needed
check:





OK