Question

解二元一次方程 x分之48 + y分之48 =2 和 x分之20 + y分之30 =1

Answer 1

48/x+48/y=2 => 1/x+1/y=1/24

20/x+30/y=1 => 1/x+1.5/y = 1/20

两式相减0.5/y=1/20-1/24=1/120

所以y=60,代入1/x=1/24-1/60=1/40

x=40