SOLUTION: An 80-pound grass seed mixture is 30% bluegrass seed. How many pounds of seed containing no bluegrass seed (0%) should be added to the seed mixture for a resulting blend that is 20

Question 242864: An 80-pound grass seed mixture is 30% bluegrass seed. How many pounds of seed containing no bluegrass seed (0%) should be added to the seed mixture for a resulting blend that is 20% bluegrass seed? Construct a table, then solve
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
An 80-pound grass seed mixture is 30% bluegrass seed. How many pounds of seed containing no bluegrass seed (0%) should be added to the seed mixture for a resulting blend that is 20% bluegrass seed?
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Equation:
blue + blue = blue
0.30*80 + 0*x = 0.20(80+x)
Multiply thru by 100 to get:
30*80 = 20*80 + 20x
20x = 10*80
x = 40 lb. (amount of seed with no bluegrass that must be added to the mix)
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Cheers,
Stan H.
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