两道简单方程(1)(x+1)-2(x-1)=1-3x(2)2(x-2)-(4x-1)=3(1-x)列试回答

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/28 21:03:09
两道简单方程(1)(x+1)-2(x-1)=1-3x(2)2(x-2)-(4x-1)=3(1-x)列试回答

两道简单方程(1)(x+1)-2(x-1)=1-3x(2)2(x-2)-(4x-1)=3(1-x)列试回答
两道简单方程
(1)(x+1)-2(x-1)=1-3x
(2)2(x-2)-(4x-1)=3(1-x)
列试回答

两道简单方程(1)(x+1)-2(x-1)=1-3x(2)2(x-2)-(4x-1)=3(1-x)列试回答
x+1-2x+2=1-3x
-x+3=1-3x
x=-1
2x-4-4x+1=3-3x
-2x-3=3-3x
x=6

(1)(x+1)-2(x-1)=1-3x
x+1-2x+2=1-3x
x-2x+3x=1-2-1
2x=-2
x=-1

(2)2(x-2)-(4x-1)=3(1-x)
2x-4-4x+1=3-3x
2x-4x+3x=3-1+4
x=6

(1) x= -1
(2) x= 6