5(x+1) - 13 >= 7x + 20

5x + 5 - 13 >= 7x + 20

5x - 8 >= 7x + 20

Subtract 5x from both sides:

-8 >= 2x + 20

Subtract 20 from both sides:

-28 >= 2x

Divide by 2:

-14 >= x

Ответ: x <= -14.