SOLUTION: Sandy has two bags of nuts; one with 79% peanuts, and the other with 11% peanuts. To make a 7 lb bag of 49% peanuts, how much of each should Sandy use?

Question 962369: Sandy has two bags of nuts; one with 79% peanuts, and the other with 11% peanuts. To make a 7 lb bag of 49% peanuts, how much of each should Sandy use?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = pounds of 79% peanuts needed
Let = pounds of 11% peanuts needed
----------------------------------------
(1)
(2)
-------------------------------
(2)
(2)
Multiply both sides of (1) by and
subtract (1) from (2)
(2)
(1)
-------------------------

and
(1)
(1)
(1)
3.9118 pounds of 79% peanuts are needed
3.0882 pounds of 11% peanuts are needed
check:
(2)
(2)
(2)
(2)
(2)
OK
hope I got it

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