Question

пожалуйста помогите! ​

Answer 1

Пошаговое объяснение:

$8x - 7 = 3x + n \\ 8x - 3x = 7 + n \\ 5x = 7 + n \\ x = \frac{7 + n}{5} \\ \\ \frac{7 + n}{5} = - 2 \\ 7 + n = - 2 \times 5 \\ 7 + n = - 10 \\ n = - 10 - 7 \\ n = - 17$

$\frac{7 + n}{5} = - 0.2 \\ 7 + n = - 0.2 \times 5 \\ 7 + n = - 1 \\ n = - 1 - 7 \\ n = - 8$

$\frac{7 + n}{5} = 0.4 \\ 7 + n = 0.4 \times 5 \\ 7 + n = 2 \\ n = 2 - 7 \\ n = - 5$

$\frac{7 + n}{5} = 3 \\ 7 + n = 3 \times 5 \\ 7 + n = 15 \\ n = 15 - 7 \\ n = 8$