SOLUTION: A butcher has some hamburger that is 21% fat and some that is 15% fat. How many pounds of each should be mixed to make 75 lb of hamburger that is 17% fat?

Question 704562: A butcher has some hamburger that is 21% fat and some that is 15% fat. How many pounds of each should be mixed to make 75 lb of hamburger that is 17% fat?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = pounds of 21% hamburger needed
Let = pound of 15% hamburger needed
given:
(1)
(2)
-----------------------------
(2)
(2)
(2)
Multiply both sides of (1) by and
subtract (1) from (2)
(2)
(1 )

and
(1)
(1)
25 pounds of 21% hamburger are needed
50 pound of 15% hamburger are needed
check:
(2)
(2)
(2)
(2)
(2)
OK

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