SOLUTION: How many pounds of coffee beans selling for $2.20 per pound should be mixed with 4 pounds of coffee beans selling for $3.00 per pound to obtain a mixture selling for $2.52 per poun

Question 911239: How many pounds of coffee beans selling for $2.20 per pound should be mixed with 4 pounds of coffee beans selling for $3.00 per pound to obtain a mixture selling for $2.52 per pound?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
We have 4 lb of $3 coffee
We want to add some $2.20 coffee to make $ 2.52 coffee
0.022*x+0.03*4=0.0252(4+x)
0.022*x+0.12=0.1008+0.0252x
0.022x-0.0252x=0.1008-0.12
-0.0032x=-0.0192
x=6.0 lb at $2.20 (0.132) is added to 4 lb at $3(0.12) to make $2.52 of 10.0 lb(0.252)
check
0.022*6.0+0.03*4=0.0252(4+6.0)
0.132+0.12=0.0252(10.0)
0.252=0.252
ok
codemixadd

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