18. Реши уравнения. * x - 12 = 0 * 25 + x = 25 * x : 108 = 1 * y : 1 = 37 * x * 15 = 0 * x * 18 = 18

Решение: * x - 12 = 0 x = 12 * 25 + x = 25 x = 0 * x : 108 = 1 x = 108 * y : 1 = 37 y = 37 * x * 15 = 0 x = 0 * x * 18 = 18 x = 1