25X - 2(15 - 5X) < 6(6X - 7)25X - 30 + 10X < 36X - 4235X - 30 < 36X - 42-30 + 42 < 36X - 35X12 < X
Ответ: X > 12
25X - 2(15 - 5X) < 6(6X - 7)
25X - 30 + 10X < 36X - 42
35X - 30 < 36X - 42
-30 + 42 < 36X - 35X
12 < X
Ответ: X > 12