Question 718272
r, n, kgs of raisins , nuts.  
R, N, prices of raisin, nuts, dollars per kg., 3.50, 4.75
T, the target price in dollars per kg, 4.00
M, the expected amount of mixture, 20 kg.



Rational Equation for Price
{{{(R*r+N*n)/M=T}}}


Sum of The Two Foods, kilograms
{{{r+n=20}}}


Two equations, two unknowns.  Solve for r and n.