18х-(7х+4)=5-4х уравнение
3/5?
дробь же, ну.
18x - (7x + 4) = 5 - 4x 18x - 7x - 4 = 5 - 4x 11x - 4 = 5 - 4x 11x + 4x = 5 + 4 15x = 9 x = 3/5