Question 101801
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