Question

x - 30 : x - 5 = - 4
Найдите корень уравнения)

Answer 1

$\frac{x - 30}{x - 5} = - 4 \\ x - 30 = ( - 4) \times (x - 5) \\ x - 30 = - 4x + 20 \\ x + 4x = 20 + 30 \\ 5x = 50 \\ x = 10$