Решите уравнение: a) 7x - 6.3 = 0; б) 1 - 9x = 0; в) -x + 4.2 = -0.8; г) 16.2 - x = -13.5

a) 7x - 6.3 = 0 7x = 6.3 x = \(\frac{6.3}{7}\) x = 0.9 **Ответ: x = 0.9** б) 1 - 9x = 0 -9x = -1 x = \(\frac{-1}{-9}\) x = \(\frac{1}{9}\) **Ответ: x = \(\frac{1}{9}\)** в) -x + 4.2 = -0.8 -x = -0.8 - 4.2 -x = -5 x = 5 **Ответ: x = 5** г) 16.2 - x = -13.5 -x = -13.5 - 16.2 -x = -29.7 x = 29.7 **Ответ: x = 29.7**