x-1/x=17+17/18 急、急、急.
问题描述:
x-1/x=17+17/18 急、急、急.
答
x-1/x=17+17/18
x-1/x=18-1/18
x=18
x-1/x=17+17/18 急、急、急.
x-1/x=17+17/18
x-1/x=18-1/18
x=18