Помогите пожалуйста❤️❤️❤️

Ответ:

1) 2(x-5)-12=3(1-x)

2x -10x-12 = 3-3x

-8x-12 = 3-3x

8x-3x = -3-12

5x = -15

x = -3

2) х – 10=5 (2x+ 1)+57

x-10 = 10x+5+57

x-10 = 10x + 62

10x-x = -10-62

9x = -72

x = -8

3) 3 (x – 5) + 10 (x - 8) =30

3x-15+10x-80=30

13x = 30+15+80

13x = 125

x = 125/13