(x+20-10)乘3⼀10-(x-10)乘1⼀3=5 求解,要过程!!

2025-06-21 08:50:36
推荐回答(2个)
回答1:

(x+20-10)乘3/10-(x-10)乘1/3=5 两边乘30
9(x+10)-10(x-10)=150
9x+90-10x+100=150
10x-9x=190-150
x=40

回答2:

解:(x+20-10)×3/10-(x-10)×1/3=5
9(x+10)-10(x-10)=150
9x+90-10x+100=150
10x-9x=190-150
x=40