Ответ:

Пошаговое объяснение:

1)х+3=-9x

x + 9x = -3

10x = -3

x = -3:10

x = -0,3

2)10x+9=7x

10x - 7x = -9

3x = -9

x = -9:3

x = -3

3)3x+5+×(x+5)=(1-x)+4

4)8-5×(2x-3)=13-6x

8 - 10x + 15 = 13 - 6x

23 - 10x = 13 - 6x

10x - 6x = 23 - 13

4x = 10

x = 10:4

x = 2,5

5)-x-2+3(x-3)=2(4-x)-3

-x - 2 + 3x - 9 = 8 - 2x - 3

2x - 11 = 5 - 2x

2x + 2x = 5 + 11

4x = 16

x = 16:4

x = 4

6)10×(x-9)=7

x - 9 = 7:10

x - 9 = 0,7

x = 0,7+9

x = 9,7

7)-9×(8-9x)=4x+5

-72 + 81x = 4x + 5

81x - 4x = 5 + 72

77x = 77

x = 77:77

x = 1