<PRE><B>Question 841637</B>
Let x=amount of pistachio kernels needed
Then 50-x=amount of almonds needed

Well now we know that the total cost of the nuts before they are mixed together ($10x+ $8.00(50-x)) has to equal the total cost of the mixture (50*$8.80), soooo:
10x+8.00(50-x)=50*8.80  ($ understood)
10x+400-8x=440  collect like terms
2x=40
x=20 lb---amount of pistachio kernels needed
50-x=50-20=30 amount of almonds needed

CK
20*10 +30*8=50*8.80
200+240=440
440=440

Hope this helps--ptaylor </PRE>