Question

Решите очень срочно задание 1,2

Answer 1

#1

1)

$2 frac{1}{6} + 2 frac{2}{12} times (1.25 - 1.64 div 0.8) = \ = frac{13}{6} + frac{26}{12} times (1.25 - 2.05) = \ = frac{13}{6} + frac{26}{12} times ( - 0.8) = \ frac{13}{6} + frac{26}{12} times ( - frac{4}{5} ) = \ = frac{13}{6} - frac{26}{3} times frac{1}{5} = \ = frac{13}{6} - frac{26}{15} = frac{13}{30}$

2)

$frac{(4 frac{2}{3} div 2 - 1.8) times 0.75 - 0.3}{2.32 div 14.5} = frac{( frac{14}{3} times frac{1}{2} - frac{9}{5}) times frac{3}{4} - frac{3}{10} }{0.16} = \ = frac{( frac{7}{3} - frac{9}{5}) times frac{3}{4} - frac{3}{10} }{ frac{4}{25} } = frac{ frac{8}{15} times frac{3}{4} - frac{3}{10}}{ frac{4}{25} } = \ = frac{ frac{2}{5} - frac{3}{10} }{ frac{4}{25} } = frac{ frac{1}{10} }{ frac{4}{25} } = frac{5}{8} = 0.625$

#2

1)

$frac{x + 3}{3} = - 2 - frac{1 - 3x}{4} \ 4x + 12 = - 24 - 3 + 9x \ 4x + 12 = - 27 + 9x \ 4x - 9x = - 27 - 12 \ - 5x = - 39 \ x = frac{39}{5} = 7.8$