Question

Пожалуйста 818 2,3,4.

Answer 1

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