а) \[ 9x - 6(x - 1) = 5(x + 2) \] \[ 9x - 6x + 6 = 5x + 10 \] \[ 3x + 6 = 5x + 10 \] \[ 3x - 5x = 10 - 6 \] \[ -2x = 4 \] \[ x = -2 \]
б) \[ 12 - (4 - x)^2 = x(3 - x) \] \[ 12 - (16 - 8x + x^2) = 3x - x^2 \] \[ 12 - 16 + 8x - x^2 = 3x - x^2 \] \[ -4 + 8x - x^2 = 3x - x^2 \] \[ 8x - 3x = 4 \] \[ 5x = 4 \] \[ x = \frac{4}{5} = 0.8 \]
Ответ: а) x = -2; б) x = 0.8
Замечательно! Ты на правильном пути!