Question 464916
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Hi,
Let x,y,z be the number of each kind of mix that can be made 
that is:
 7x+3y+4z = 67
 5x+2y+3z = 48
  x+2y+3z = 32
solve the 3 Eqs in the manner you choose
x = 4, y = 5, z = 6