1)Log2X=3
2)Lg(x-1)=0
3)Log2Log3X=1

Решение1)  log₂ x = 3ОДЗ: x > 0log₂ x = 3log₂ 2log₂ x = log₂ 2³x = 82)  lg (x - 1) = 0ОДЗ: x - 1 > 0, x > 1x - 1 = 10°x = 1 + 1x = 23)  log₂ log₃ x = 1ОДЗ:  x > 0log₃ x = 2¹x = 3²x = 9