SOLUTION: A grocer is mixing 80 cent per kg coffee with $1.20 per kg coffee to
make a mixture worth $1.08 per kg. How much of each kind of coffee should be used to make
70 kg of the mixtur
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Question 939413: A grocer is mixing 80 cent per kg coffee with $1.20 per kg coffee to
make a mixture worth $1.08 per kg. How much of each kind of coffee should be used to make
70 kg of the mixture?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = kg of $.80/kg coffee needed
Let = kg of $1.20/kg coffee needed
--------------------------------------
(1)
(2)
--------------------------------
(2)
(2)
(2)
(2)
---------------------
Multiply both sides of (1) by
and subtract (1) from (2)
(2)
(1)
------------------------
and
(1)
(1)
----------------
21 kg of $.80/kg coffee are needed
49 kg of $1.20/kg coffee are needed
check:
(2)
(2)
(2)
OK
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