Question

Пожалуйста 818 2,3,4.

Answer 1

$2) \frac{5}{6} m + 2 = \frac{1}{3} m - 0.8 \\ \frac{5}{6} m + 2 = \frac{1}{3} m - \frac{9}{5} | \times 30 \\ 25m + 60 = 10m - 54 \\ 25m - 10m = - 54 - 60 \\ 15m = - 114 \\ m - \frac{38}{5} = - 7 \frac{3}{2} \\ 3) \frac{3}{4} y - 12 = 5 - \frac{1}{4} - 12 \\ \frac{3}{4} y = 5 - \frac{1}{4} \\ \frac{3}{4} y = \frac{19}{4} \\ y = \frac{19}{3} = 6 \frac{1}{3} \\ 3) \frac{7}{12} n - 3 = \frac{1}{2} n + 0.7 \\ \frac{7}{12} n - 3 = \frac{1}{2} n + \frac{7}{10} | \times 60 \\ 35x - 180 = 30x + 42 \\ 35 x - 30x = 42 + 180 \\ 5x = 222 \\ x = \frac{222}{5} = 44 \frac{2}{5}$