Question 217133
Fertilizer with weed control costing $38 per 50- pound bag is to be mixed with a less expensive fertilizer costing $6.00 per 50- lb bag to make 16 bags of fertilizer that can be sold for $28.00 per bag. How many bags of cheaper fertilizer should be used. 
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Equation:
value + value = value
38x + 6(16-x) = 28*16
38x + 96 - 6x = 28*16
32x = 28*16 - 96
32x = 352
x = 11 (# of bags of $38 bags needed for the mix)
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Cheers,
Stan H.