如何解方程x-2⼀0.2-x+1⼀0.5=3可以先分别将分子分母扩大10倍

2024-12-21 09:09:29
推荐回答(2个)
回答1:

x-2/0.2-x+1/0.5=3,?
(x-2)/0.2-(x+1)/0.5=3,!
(x-2)/0.2-(x+1)/0.5=3
10(x-2)/2-10(x+1)/5=3
5(x-2)-2(x+1)=3
5x-10-2x-2=3
3x=3+12
3x=15
x=15/3=5.

回答2:

x-2/0.2-x+1/0.5=310(x-2)/2-10(x+1)/5=3
5(x-2)-2(x+1)=3
5x-10-2x-2=3,5x-2x=3+10+2

3x=15
x=5.