56/(13-y)=100-92=8
56/8=13-y
7=13-y
y=13-7=6
92+56:(14-y)=100
56:(14-y)=100-92
56:(14-y)=8
8(14-y)=56
14-y=56:8
14-y=7
y=14-7
y=7
