Помогите пж!!!
1) 15+x=19;
2) 6x+17=107;
3) –8x+19= –5;
4) 19–7x=5;
5) –x–4= –6;
6) –8x–39=3x+5;
7) –6x+31=39+2x;
8) 3(x+5)–6= –7x+129;
9) 9(x+9)–91= –4x+42

Объяснение:

1)15+х=19

х=19-15

х=4

2)6х+17=107

6х=107-17

6х=90

х=90÷6

х=15

3)-8х+19= -5

-8х=-5-19

-8х=-24

х=-24÷(-8)

х=3

4)19-7х=5

-7х=5-19

-7х=-14

х=-14÷(-7

х=2

5)-х-4=-6

-х=-6+4

х=2

6)-8х-39=3х+5

-8х-3х=5+39

-11х=44

х=44÷(-11)

х=-4

7)-6х+31=39+2х

-6х-2х=39-31

-8х=8

х=8÷(-8)

х=-1

8)3(х+5)-6=-7х+129

3х+15-6=-7х+129

3х+9=-7х+129

3х+7х=129-9

10х=120

х=120÷10

х=12

9)9(х+9)-91=-4х+42

9х+81-91=-4х+42

9х-10=-4х+42

9х+4х=42+10

13х=52

х=4