а)
13x - 1 = 25
13x = 26
x = 2
б)
x^2 - 6x + 9 + 6x = 10
x^2 + 9 = 10
x^2 = 1
x = ± 1
в) 1 - x^3 = -2x^3
x^3 = -1
x = - 1
г)
√2 x = ± 2
x = ± √2
