Question

помогите пожа-
луйста​

Answer 1

Ответ:

$\frac{x + 3}{6} - 1 + \frac{x}{3} = \frac{3 - x}{2} \\ x + 3 - 6 + 2x = 9 - 3x \\ 6x = 12 \\ x = 2 \\ \\ \frac{3x + 5}{5} + \frac{9x - 5}{4} = 6 + \frac{3x + 1}{2} \\ 12x + 20 + 45x - 25 = 120 + 30x + 10 \\ 27x = 135 \\ x = 5 \\ \\ \\ 7x + 3 = 31 \\ 3x - 2a = 16 \\ \\ 7x - 29 = 0 \\ 3x - 2a - 16 = 0 \\ \\ 7x - 29 = 3x - 2a - 16 \\ 2a = 3x - 16 - 7x + 29 \\ 2a = 13 - 4x \\ a = 6.5 - 2x$