解下列方程式(1) (5x-1)/4=(3x+1)/2-(2-x)/3(2) (3x+2)/2-1=(2x-1)/4-(2x-1)/5(3) (3x+5)/2=(2x-1)/3
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/27 18:31:41
![解下列方程式(1) (5x-1)/4=(3x+1)/2-(2-x)/3(2) (3x+2)/2-1=(2x-1)/4-(2x-1)/5(3) (3x+5)/2=(2x-1)/3](/uploads/image/z/12535718-14-8.jpg?t=%E8%A7%A3%E4%B8%8B%E5%88%97%E6%96%B9%E7%A8%8B%E5%BC%8F%EF%BC%881%EF%BC%89+%285x-1%29%2F4%3D%283x%2B1%29%2F2-%282-x%29%2F3%EF%BC%882%EF%BC%89+%EF%BC%883x%2B2%29%2F2-1%3D%282x-1%29%2F4-%282x-1%29%2F5%283%29+%283x%2B5%29%2F2%3D%282x-1%29%2F3)
解下列方程式(1) (5x-1)/4=(3x+1)/2-(2-x)/3(2) (3x+2)/2-1=(2x-1)/4-(2x-1)/5(3) (3x+5)/2=(2x-1)/3
解下列方程式
(1) (5x-1)/4=(3x+1)/2-(2-x)/3
(2) (3x+2)/2-1=(2x-1)/4-(2x-1)/5
(3) (3x+5)/2=(2x-1)/3
解下列方程式(1) (5x-1)/4=(3x+1)/2-(2-x)/3(2) (3x+2)/2-1=(2x-1)/4-(2x-1)/5(3) (3x+5)/2=(2x-1)/3
(1) (5x-1)/4=(3x+1)/2-(2-x)/3
二边同乘12:
3(5x-1)=6(3x+1)-4(2-x)
15x-3=18x+6-8+4x
18x+4x-15x=-3+2
7x=-1
x=-1/7
(2) (3x+2)/2-1=(2x-1)/4-(2x-1)/5
二边同乘20
10(3x+2)-20=5(2x-1)-4(2x-1)
30x+20-20=2x-1
18x=-1
x=-1/18
(3) (3x+5)/2=(2x-1)/3
2(2x-1)=3(3x+5)
4x-2=9x+15
5x=-17
x=-17/5
1) (5x-1)/4=(3x+1)/2-(2-x)/3
12(5x-1)/4=12(3x+1)/2-12(2-x)/3
3(5x-1)=6(3x+1)-4(2-x)
15x-3=18x+6-8+4X
7X=-1
X=-1/7
=------------------------------------
(2) (3x+2)/2-1=...
全部展开
1) (5x-1)/4=(3x+1)/2-(2-x)/3
12(5x-1)/4=12(3x+1)/2-12(2-x)/3
3(5x-1)=6(3x+1)-4(2-x)
15x-3=18x+6-8+4X
7X=-1
X=-1/7
=------------------------------------
(2) (3x+2)/2-1=(2x-1)/4-(2x-1)/5
二边同乘20
10(3x+2)-20=5(2x-1)-4(2x-1)
30x+20-20=2x-1
18x=-1
x=-1/18
(3) (3x+5)/2=(2x-1)/3
2(2x-1)=3(3x+5)
4x-2=9x+15
5x=-17
x=-17/5
收起
1:两边同乘12得:15x-3=18x+6-8+4x得:6x=-1,x=-1/6 2.两边同乘20得:30x+20-20=10x-5-8x+4得:28x=-1,x=-1/28 3.两边乘6.9x+15=4x-2,x=-17/5