Okay, let's break this down step-by-step:
* Birdseed costs $0.68 per pound
* Sunflower seeds cost $0.98 per pound
* The 40 pound mixture will sell for $0.92 per pound
* Let's call the number of pounds of birdseed x
* Then the number of pounds of sunflower seeds is 40 - x
* $0.92 * 40 = $36
* $0.68x + $0.98(40-x) = $36
* $0.68x + $39.20 - $0.98x = $36
* $-0.3x = $-3.20
* x = 10
* So 10 pounds of birdseed and 40 - 10 = 30 pounds of sunflower seeds.
In summary:
10 lbs of birdseed
30 lbs of sunflower seeds
Does this make sense? Let me know if you have any other questions!