Пошаговое объяснение:
1). - 5х+2=-10х
10x - 5x = -2
5x = -2
x = -2:5
x = -0,4
2). - х+7=6х
6x + x = 7
7x = 7
x = 1
3). 9+2(2х+1)=1
9 + 4x + 2 = 1
11 + 4x = 1
4x = 1 - 11
4x = -10
x = -10:4
x = -2,5
1) -5х+2=-10х
-5х+10х=-2
5х=-2
х=-2/5
х=-0,4
2) -х+7=6х
-х-6х=-7
-7х=-7
х=-7/-7
х=1
3) 9+2(2х+1)=1
9+4х+2=1
11+4х=1
4х=1-11
4х=-10
х=-10/4
х=-2,5
Пошаговое объяснение:
1). - 5х+2=-10х
10x - 5x = -2
5x = -2
x = -2:5
x = -0,4
2). - х+7=6х
6x + x = 7
7x = 7
x = 1
3). 9+2(2х+1)=1
9 + 4x + 2 = 1
11 + 4x = 1
4x = 1 - 11
4x = -10
x = -10:4
x = -2,5
1) -5х+2=-10х
-5х+10х=-2
5х=-2
х=-2/5
х=-0,4
2) -х+7=6х
-х-6х=-7
-7х=-7
х=-7/-7
х=1
3) 9+2(2х+1)=1
9+4х+2=1
11+4х=1
4х=1-11
4х=-10
х=-10/4
х=-2,5