ПОМОГИТЕ! 1)0,2(5х-2)=0,3(2х-1)-1,9 2)1/2(1/2х+4)=1/4х-1/8

Question

ПОМОГИТЕ! 1)0,2(5х-2)=0,3(2х-1)-1,9 2)1/2(1/2х+4)=1/4х-1/8

Answer 1

1)0,2(5х-2)=0,3(2х-1)-1,9
x - 0.4 = 0.6x - 0.3 - 1.9
x -0.6x = -0.3-1.9+0.4
0.4x = -1.8
x= -1.8 :0.4
x= -4.5

2)1/2(1/2х+4)=1/4х-1/8
1/4x + 2 = 1/4x -1/8
1/4x - 1/4x = 1/8 - 2
x= -15/8