Question

Помогите пожалуйста
(1-3 задание )

Answer 1

Ответ:

$1)a)5x - 3 = 4x + 7 \\ 5x - 4x = 7 + 3 \\ x = 10 \\ b) - 3x + 2.4 = 5x - 3 \\ - 3x - 5x = - 3 - 2.4 \\ - 8x = - 5.4 \\ 8x = 5.4 \\ x = 0.675 \\ 2)1 - (1 - 5x) = 14 \\ 1 - 1 + 5x = 14 \\ 5x = 14 \\ x = \frac{14}{5} \\ x = 2.8 \\ 3) \frac{x - 8}{7} = - \frac{3.2}{1.6} \\ \frac{x - 8}{7} = - 2 \\ x - 8 = - 14 \\ x = - 14 + 8 \\ x = - 6$