Question

Помогите пожалуйста

Answer 1

Ответ:

1.

$\frac{1}{5} x = 5 \\ x = 5 \div \frac{1}{5} \\ x = 5 \times 5 \\ x = 25$

2.

$2x - (6x + 1) = 9 \\ 2x - 6x - 1 = 9 \\ - 4x = 9 + 1 \\ - 4x = 10 \\ x = \frac{10}{ - 4} \\ x = - \frac{5}{2} \\ x = - 2.5$

4.

$6x - (2x - 5) = 2(2x + 4) \\ 6x - 2x + 5 = 4x + 8 \\ 4x + 5 = 4x + 8 \\ 4x - 4x = 8 - 5 \\ 0 = 3$

ответа не будет

5.

$\frac{x}{7} - 3x - \frac{1}{14} = 2 \\ \frac{2x}{14} - \frac{1}{14} = 2 + 3x \\ \frac{2x - 1}{14} = 2 + 3x \\ 2x - 1 = 14(2 + 3x) \\ 2x - 1 = 28 + 42x \\ 2x - 42x = 28 + 1 \\ - 40x = 29 \\ x = - \frac{29}{40}$