Question

3ⅹ-2.7x4=1.2解方程

解方程,帮下忙.全对+分...
1.5(x-1)=3(x+1)
2.7(2x-1)-3(4x-1)=5(3x+2)
3.2/3[3/2(1/4x-1/2)-3]-2=x
4.1/2[1/2(1/2y-3)-3]-3=0
5.m(3x-1)=4x+m-2

Answer 1

1.5(x-1)=3(x+1)
5x-5=3x+3
5x-3x=3+5
2x=8
x=4
2.7(2x-1)-3(4x-1)=5(3x+2)
14x-7-12x+3=15x+10
2x-15x=10+4
-13x=14
x=-14/13
3.2/3[3/2(1/4x-1/2)-3]-2=x
1/4x-1/2-2-2=x
1/4x-x=4.5
x=-18
4.1/2[1/2(1/2y-3)-3]-3=0
1/4(1/2y-3)-3/2-3=0
1/8y-3/4-4.5=0
1/8y=5.25
y=42
5.m(3x-1)=4x+m-2
3mx-m=4x+m-2
3mx-4x=2m-2
(3m-4)x=2m-2
x=(2m-2)/(3m-4)