<PRE><B>Question 394150</B>
the total number of pounds and the total cost, 18 pounds for $92.07.
 the price per pound of each kind of coffee($4.89 for columbian and $5.43 for Mocha Java).
  figure out how many pounds of each type of beans used.
:
Let m = amt of Mocha coffee
then
(18-m) = amt of Columbian coffee
:
5.43m + 4.89(18-m) = 92.07
:
5.43m + 88.02 - 4.89m = 92.07
:
5.43m - 4.89m = 92.07 - 88.02
:
.54m = 4.05
m = {{{4.05/.54}}}
m = 7.5 lb of Mocha
then
18 - 7.5 = 10.5 lb of Columbian 
:
:
Check this 
5.43(7.5) + 4.89(10.5)
40.725 + 51.345 = 92.07, confirms our solutions
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