Question 452357
how many pounds of salted nuts selling for $1.40 per pound should be mixed with 7
 pounds of salted nuts selling for $2.40 per pound to obtain a mixture selling for $2.10 per pound?
:
Let x = amt of $1.40 nuts required
:
A typical mixture equation
1.40x + 2.40(7) = 2.10(x+7) 
1.4x + 16.8 = 2.1x + 14.7
16.8 - 14.7 = 2.1x - 1.4x
2.1 = .7x
x = {{{2.1/.7}}}
x = 3 lb of $1.40 nuts required
:
:
Check this out in the original mixture equation
1.4(3) + 2.4(7) = 2.1(3+7)
4.2 + 16.8 = 21