x÷2/3=8/9
x=8/9×2/3
x=27分之16
x+1/6x=4
(1+1/6)x=4
7/6x=4
x=4÷7/6
x=7分之24
x-2/7x=3/4
5/7x=3/4
x=3/4÷5/7
x=20分之21
3x+3/4x=7+1/2
15/4x=15/2
x=15/2÷15/4
x=2
(5+1/4)x=7+1/2
21/4x=15/2
x=15/2÷21/4
x=7分之10
x÷2/3=8/9
x=8/9×2/3
x=27分之16
x+1/6x=4
(1+1/6)x=4
7/6x=4
x=4÷7/6
x=7分之24
x-2/7x=3/4
5/7x=3/4
x=3/4÷5/7
x=20分之21
3x+3/4x=7+1/2
15/4x=15/2
x=15/2÷15/4
x=2
(5+1/4)x=7+1/2
21/4x=15/2
x=15/2÷21/4
x=7分之10