Question 752538: In the barn there are 100 kg wheat and rye, rye is 10%. How many kg of wheat should be added which the content of rye to be 4%?
Answer by malglu(63)   (Show Source):
You can put this solution on YOUR website! there is now 10kg of rye, this will not chankge. we want to add x kg of wheat to the 100kg of mixed grains we have, so that 4% (4/100) of it will be 10kg of rye
4/100 * (100 +x) = 10
multiply out and reaarange to get 4x=600
x = 150
so we need to add 150kg of wheat
(this gives us 250kg of mixture of which 4% is rye, because 10kg/250kg is 4%)
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