1) -6x - 5 = 4x
-6x - 4x = 5
-10x = 5
x = 5 : (-10)
x = -0,5
2) -5x = 5x - 6
-5x - 5x = -6
-10x = -6
x = -6 : (-10)
x = 0,6
3) 2 + 8x = 3x + 9
8x - 3x = 9 - 2
5x = 7
x = 7 : 5
x = 1,4
4) 5 - 2x = 8x + 9
-2x - 8x = 9 - 5
-10x = 4
x = 4 : (-10)
x = -0,4
5) x - x/7 = -9/14 |*14
14x - 2x = -9
12x = -9
x = -9 : 12
x = -0,75
6) x - x/9 = -26/9 |*9
9x - x = -26
8x = -26
x = -26 : 8
x = -3,25
7) x + x/2 = -12 |*2
2x + x = -24
3x = -24
x = -24 : 3
x = -8
8) x + x/12 = -13/4 |*12
12x + x = -39
13x = -39
x = -39 : 13
x = -3
9) x + x/2 = 9/2 |*2
2x + x = 9
3x = 9
x = 9 : 3
x = 3
10) x/5 + x/9 = -14/15 |*45
9x + 5x = -42
14x = -42
x = -42 : 14
11) 9 + x = x + 3/4
x - x = 3/4 - 9
0 = 3/4 - 9 -- неверно
корней нет
1) -6x - 5 = 4x
-6x - 4x = 5
-10x = 5
x = 5 : (-10)
x = -0,5
2) -5x = 5x - 6
-5x - 5x = -6
-10x = -6
x = -6 : (-10)
x = 0,6
3) 2 + 8x = 3x + 9
8x - 3x = 9 - 2
5x = 7
x = 7 : 5
x = 1,4
4) 5 - 2x = 8x + 9
-2x - 8x = 9 - 5
-10x = 4
x = 4 : (-10)
x = -0,4
5) x - x/7 = -9/14 |*14
14x - 2x = -9
12x = -9
x = -9 : 12
x = -0,75
6) x - x/9 = -26/9 |*9
9x - x = -26
8x = -26
x = -26 : 8
x = -3,25
7) x + x/2 = -12 |*2
2x + x = -24
3x = -24
x = -24 : 3
x = -8
8) x + x/12 = -13/4 |*12
12x + x = -39
13x = -39
x = -39 : 13
x = -3
9) x + x/2 = 9/2 |*2
2x + x = 9
3x = 9
x = 9 : 3
x = 3
10) x/5 + x/9 = -14/15 |*45
9x + 5x = -42
14x = -42
x = -42 : 14
x = -3
11) 9 + x = x + 3/4
x - x = 3/4 - 9
0 = 3/4 - 9 -- неверно
корней нет