Question 746905
x = granola y = apples
   x + y    = 6........1
210x + 424y = 1688.....2
 
Multiply 1 by 424

 424x + 424y = 2544
 210x + 424y = 1688

Subtract

 214x        = 856
    x        = 856/214
    x        = 4
Substitute x = 4 into 1

  x + y = 6
  4 + y = 6 
      y = 2

 So 4 pounds of Granola and 2 pounds of apples