X-{2⼀5X-9+〔X-(2⼀5X-9)〕*2⼀3+5}=15怎么解

2025-04-30 07:16:55
推荐回答(2个)
回答1:

X-{2/5X-9+〔X-(2/5X-9)〕*2/3+5}=15
x-[2/5x-9+(x-2/5x+9)*2/3+5]=15
x-[(2/5x-9)/3+x*2/3+5]=15
x-[4/5x+2]=15
1/5x=17
x=85

回答2:

一元一次方程,求X