Решите уравнение: а) −3x − 1 = 0; б) 2x + 7 = 5; в) 5x − 2 = 0; г) 9 − 4x = 1.
−3x − 1 = 0 −3x = 1 $x = -\frac{1}{3}$
2x + 7 = 5 2x = 5 − 7 2x = −2 x = −1
5x − 2 = 0 5x = 2 $x = \frac{2}{5}$
9 − 4x = 1 −4x = 1 − 9 −4x = −8 x = 2
