SOLUTION: A biker mixes 11 pounds of raisens that cost $2.30 per pound with peanuts that cost $4.50 per pound to make a mixture that cost $3.29 per pound. How many pounds of peanuts did the

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Question 101801: A biker mixes 11 pounds of raisens that cost $2.30 per pound with peanuts that cost $4.50 per pound to make a mixture that cost $3.29 per pound. How many pounds of peanuts did the biker use?
Answer by alisttutors(8) About Me  (Show Source):
You can put this solution on YOUR website!
The answer is 9 lbs.
I started off with the equation:
(11lbs($2.30/lb) + xlbs($4.50/lb))/(11+x)=3.29
multiplying the left side by the denominator yields:
$25.30 + 4.5x = $36.19 + 3.29x
Grouping the x's and constants on either side of the equation yields:
1.21x=10.89
Giving the answer:
x=9 lbs