这个方程怎么解啊，我明明会做的怎么还是错了啊//

5/24÷x=5/18
x=5/24÷5/18=5/24*18/5=3/4

x-1/9x=7+1/5
8/9x=36/5
x=36/5*9/8=81/10

怎么可能？x=5/24*18/5=3/4

是5/18除5/24

5/24÷x=5/18
就是（5/24)/x=5/18?么
如果是，那么x=(5/24)*(18/5)

x-1/9x=7+1/5
即(8/9)x=36/5
所以x=(36/5)*(9/8)

5/24÷x=5/18
x*5/18 =5/24,
x=(5/24)/(5/18)=3/4.

x-1/9x=7+1/5
8x/9=36/5,
x=(36/5)/(8/9)=8.1

5/24÷x=5/18
5/24*1/x=5/18
5/24=5/18x
1/24=1/18*x
1/4=1/3*x
x=3/4

x-1/9x=7+1/5
两边同时乘以9x，得
9x^2-1=（36/5)*9x
9x^2-324x/5-1=0