Question

Решите 1 пример и 2 уравнения, пожалуйста
1) 2 - ( 1 11/30 - 1,7) *1 2/7 / 1 13/14 =
2) 2/3 * (1,5x + 0,6) - 0,8 * (5/12x - 0,5) = 1
3) 1/8 * (8/9x + 8) - 0,2 * (5/6x + 1 2/3) = 2

Answer 1

1)
$2 - ( frac{41}{30} - frac{51}{30} ) times frac{9}{7} times frac{14}{27} = 2 + frac{11}{30} times frac{2}{3} = 2 + frac{11}{45} = 2 times frac{11}{45}$
2)
$frac{2}{3} times ( frac{15}{10} x + frac{6}{10} ) - frac{8}{10} times ( frac{5}{12} x - frac{5}{10}) = 1 \ x + frac{4}{10} - frac{1}{3} x + frac{4}{10} = 1 \ frac{2}{3} x = frac{1}{5} \ x = frac{1}{5} times frac{3}{2} \ x = frac{3}{10} \ x = 0.3$
3)
$frac{1}{8} times ( frac{8}{9} x + 8) - frac{2}{10} times ( frac{5}{6} x + frac{10}{6} ) = 2 \ frac{1}{9} x + 1 - frac{1}{6} x - frac{1}{3} = 2 \ frac{6}{54} x - frac{9}{54} x = frac{4}{3} \ - frac{3}{54} x = frac{4}{3} \ x = - frac{4}{3} times frac{54}{3} \ x = - frac{72}{3} = - 24$