7х-2=4
7х=4+2
7х=6
х=6/7
х=0,85714285714
12-2х=3х
-3х-2х=-12
-5х=-12
х=-12/-5
х=2,4
5x – 8 = 9 + 3x
5x – 3x = 9 + 8
2x = 17
x = 8.5
9x+(6-2x)=15
9x + 6 – 2x = 15
9x – 2x = 15 – 6
7x = 9
x = 9/7
х=1,28571428571
2x-(5x+4)=-8
2x – 5x – 4 = – 8
2x – 5x = – 8 + 4
-3x = -4
x = -4/-3
х=1,33333333333
5-3(2x-7)=-6x
5 – 6x + 21 = – 6x
– 6x + 6x = – 21 – 5
0x = -26
уравнение решений не имеет
4(5x+8)-2x=12
20x + 32 – 2x = 12
20x – 2x = 12 – 32
18x = -20
9x = -10
x = -10/9
х=-1,11111111111
7х-2=4
7х=4+2
7х=6
х=6/7
х=0,85714285714
12-2х=3х
-3х-2х=-12
-5х=-12
х=-12/-5
х=2,4
5x – 8 = 9 + 3x
5x – 3x = 9 + 8
2x = 17
x = 8.5
9x+(6-2x)=15
9x + 6 – 2x = 15
9x – 2x = 15 – 6
7x = 9
x = 9/7
х=1,28571428571
2x-(5x+4)=-8
2x – 5x – 4 = – 8
2x – 5x = – 8 + 4
-3x = -4
x = -4/-3
х=1,33333333333
5-3(2x-7)=-6x
5 – 6x + 21 = – 6x
– 6x + 6x = – 21 – 5
0x = -26
уравнение решений не имеет
4(5x+8)-2x=12
20x + 32 – 2x = 12
20x – 2x = 12 – 32
18x = -20
9x = -10
x = -10/9
х=-1,11111111111