Answer :
x+y=156
0.05x+0.25y=21.6
-1/4*/ x+y=156
1/20x+1/4y=216/10
-1/4x-1/4y=156*-1/4=-39
1/20x+1/4y=216/10
+--------------------------
-4/20x=-17,4
x=87
x+y=156
87+y=156 y=69
this question answer is 87 nickels and 69 quarters
0.05x+0.25y=21.6
-1/4*/ x+y=156
1/20x+1/4y=216/10
-1/4x-1/4y=156*-1/4=-39
1/20x+1/4y=216/10
+--------------------------
-4/20x=-17,4
x=87
x+y=156
87+y=156 y=69
this question answer is 87 nickels and 69 quarters