Пошаговое объяснение:
665) -3-3х-2х=9
-3х-2х=9+3
-5х=12
Х=12:(-5)
Х=-2,4
668) 5-45х-5х=-1
-45х-5х=-1-5
-50х=-6
Х=-6:(-50)
Х=0,12
672) -8х+28+32х=4х+7
-8х+32х-4х=7-28
20х=-21
Х=-21:20
Х=-1,05
675) -х+28-4х=-7х+5
-х-4х+7х=5-28
2х=-23
Х=-23:2
Х=-11,5
3(-1 - x) - 2x = 9
-3 - 3x - 2x = 9
-3 - 5x = 9
-5x = 9+3
-5x = 12
x = -12:5
x = -2,4
6(4 - x) + 3x = 3
24 - 6x + 3x = 3
24 - 3x = 3
3x = 24 - 3
3x = 21
x = 21 : 3
x = 7
-9(8 - x) - 4x = -2
-72 + 9x - 4x = -2
-72 + 5x = -2
5x = 72 - 2
5x = 70
x = 70:5
x = 14
-5(-1 + 9x) - 5x = -1
5 - 45x - 5x = -1
5 - 50x = -1
50x = 5 + 1
50x = 6
x = 6:50
x = 0,12
-6(1 - x) + 4x = -4
-6 + 6x + 4x = -4
-6 + 10x = -4
10x = 6 - 4
10x = 2
x = 2:10
x = 0,2
Пошаговое объяснение:
665) -3-3х-2х=9
-3х-2х=9+3
-5х=12
Х=12:(-5)
Х=-2,4
668) 5-45х-5х=-1
-45х-5х=-1-5
-50х=-6
Х=-6:(-50)
Х=0,12
672) -8х+28+32х=4х+7
-8х+32х-4х=7-28
20х=-21
Х=-21:20
Х=-1,05
675) -х+28-4х=-7х+5
-х-4х+7х=5-28
2х=-23
Х=-23:2
Х=-11,5
Пошаговое объяснение:
3(-1 - x) - 2x = 9
-3 - 3x - 2x = 9
-3 - 5x = 9
-5x = 9+3
-5x = 12
x = -12:5
x = -2,4
6(4 - x) + 3x = 3
24 - 6x + 3x = 3
24 - 3x = 3
3x = 24 - 3
3x = 21
x = 21 : 3
x = 7
-9(8 - x) - 4x = -2
-72 + 9x - 4x = -2
-72 + 5x = -2
5x = 72 - 2
5x = 70
x = 70:5
x = 14
-5(-1 + 9x) - 5x = -1
5 - 45x - 5x = -1
5 - 50x = -1
50x = 5 + 1
50x = 6
x = 6:50
x = 0,12
-6(1 - x) + 4x = -4
-6 + 6x + 4x = -4
-6 + 10x = -4
10x = 6 - 4
10x = 2
x = 2:10
x = 0,2