Question 45375
Suppose you have x glasses of milk and y quarter pound servings of meat.  This would be

IRON:  0.1x +3.4y   = 7.1
PROTEIN:  8.5x +22y = 69.5


Solve the system by multiplying the first equation by -85:
-8.5x - 289y =-603.5
8.5x +22y = 69.5


Add the equations:
-267y = -534

{{{y=(-534)/(-267)= 2}}} servings of meat


If y = 2, then substitute back into either equation:
8.5x+22y = 69.5
8.5x + 44 = 69.5
8.5x = 25.5
{{{x = 25.5/8.5= 3}}} glasses of milk.


What a problem!  After all that intimidation, it came out even!!


R^2 at SCC