Question 939394
1 nickle = 0.05 dollars
1 quarter  =0.25 dollars
let x be the no of nickles
let y be the no of quarters
total no of coins  =20
  x+y = 20..............eq(1)
 total worth = $ 2.60
   x*0.05+y*0.25 = $2.60 ..............eq(2)
*[invoke linear_substitution "x", "y", 1, 1, 20, 0.05, 0.25, 2.60]
Result : nickles  =12
   quarters  = 8
 Option : C is the right choice