10/7:x=(1/4):(14/15) x*(1/4)=(10/7)*(14/15)=4/3 x=1/3
2x:2.5=5分之0.64 4x:5=0.64/5 4x=0.64 x=0.16
(2/3):(3/7)=(7/9):x x(2/3)=(3/7)(7/9)=1/3 x=2
10/7:x=(1/4):(14/15) x*(1/4)=(10/7)*(14/15)=4/3 x=1/3
2x:2.5=5分之0.64 4x:5=0.64/5 4x=0.64 x=0.16
(2/3):(3/7)=(7/9):x x(2/3)=(3/7)(7/9)=1/3 x=2