Answer :
x+y=200
x=200-y
0.1x+0.05y=16.3
0.1(200-y)+0.05y=16.3
20-0.1y+0.05y=16.3
-0.05y=16.3-20
-0.05y=-3.7
0.05y=3.7
y=3.7•100/5
y=370/5
y=74
x=200-y
x=126
A. 126 dimes and 64 nickels
x=200-y
0.1x+0.05y=16.3
0.1(200-y)+0.05y=16.3
20-0.1y+0.05y=16.3
-0.05y=16.3-20
-0.05y=-3.7
0.05y=3.7
y=3.7•100/5
y=370/5
y=74
x=200-y
x=126
A. 126 dimes and 64 nickels