七龙珠 迅雷:帮我解方程

来源:百度文库 编辑:中科新闻网 时间:2024/03/29 22:36:39
(1)2x-1=5x+7 (2)2(x-2)-(4x-1)=3(1-x)

(3)1/3*x-1-2x=-1 (4)[(x-3)/2]-[(2x+1)/3=1

(1)2x-1=5x+7
2x-5x=7+1
-3x=8
x=-8/3

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

(3)1/3*x-1-2x=-1
x-1-6x=-6
x-6x=-6+1
-5x=-5
x=1

(4)[(x-3)/2]-[(2x+1)/3=1
3(x-3)-2(2x+1)=6
3x-9-4x-2=6
3x-4x=6+9+2
-x=17
x=-17

(1)2x-1=5x+7 (2)2(x-2)-(4x-1)=3(1-x)
5x+7=2x-1 2x-4-(4x-1)=3-3x
5x=2x-7-1 2x-4+4x-1=3-3x
5x=2x-8 6x-5=3-3x
2x-5x=8 6x=3-3x+5
-3x=8 6x=8-3x
x=-8/3 6x+3x=8
x=8/8
x=1

(3)1/3*x-1-2x=-1 (4)[(x-3)/2]-[(2x+1)/3=1
1/6x=-1
x=-1*6
x=-6

(1)2x-1=5x+7 (2)2(x-2)-(4x-1)=3(1-x)
3x=-8 2x-4-4x+1-3+3x=0
x=-3/8 x=6
(3)1/3*x-1-2x=-1 (4)[(x-3)/2]-[(2x+1)/3=1
x-3-6x=-3 3x-9-4x-2=6
-5x=0 x=-17
x=0

咋乱七八糟的