Verified answer

[tex]7x + 60 = 25 \\ 7x = 25 - 60 \\ 7x = - 35 \\ x = - 35 \div 7 \\ x = - 5[/tex]

Пошаговое объяснение:

9х + 55 = 10

9х = 10 - 55

9х = -45

х = -45 : 9

х = -5