Question 948788
Want 8 kilograms of mixture, and price to be 174 dollars per kilogram.


Maybe you can do this in one variable.
x=HowMuchKilogramsofPeanut


8-x=HowMuchCashews


{{{Cost/Mass=Price}}}


{{{highlight((168*x+192*(8-x))/8=174)}}}
and solving for x should be a mostly simple chore.


You could also do this problem using two variables, like x for peanuts mass and y for cashews mass.  You would need one additional kind of equation like x+y=8.  The highlighted equation given above would be modified to use the second variable.