Решите уравнения:
а) (2х + 3) – (х – (3х + 4)) =15
б) 5х – (6х – (7х–(8х–9))) =1
в) 12х – 25 = 7х + 5
а) (2х + 3) – (х – (3х + 4)) =15
б) 5х – (6х – (7х–(8х–9))) =1
в) 12х – 25 = 7х + 5
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