Пошаговое объяснение:
- 1,2х +5 =3-0,4х
-1.2х+0.4х=3-5
-0.8х=-2
х=-2:(-0.8)
х=2.5
8х-1/3*(4,5х -5)=5-х
8х-1/3(9/2x-5)=5-x
8x-1.5х+1 2/3=5-x
8x-1.5x+x=5-1 2/3
7.5x=3 1/3
x=3 1/3:7.5
x=10/3*2/15
x=4/9
0,2/х=1 5/6/5
1 5/6x=5*0.2
1 5/6x=1
x=1:1 5/6
x=1*6/11
x=6/11
Пошаговое объяснение:
- 1,2х +5 =3-0,4х
-1.2х+0.4х=3-5
-0.8х=-2
х=-2:(-0.8)
х=2.5
8х-1/3*(4,5х -5)=5-х
8х-1/3(9/2x-5)=5-x
8x-1.5х+1 2/3=5-x
8x-1.5x+x=5-1 2/3
7.5x=3 1/3
x=3 1/3:7.5
x=10/3*2/15
x=4/9
0,2/х=1 5/6/5
1 5/6x=5*0.2
1 5/6x=1
x=1:1 5/6
x=1*6/11
x=6/11