Question

1) Нужно решить уравнение
2) Выполнить действия
Нужно срочно!!! Помогите.

Answer 1

$1) : frac{5}{4} times ( frac{8}{3} - y) = frac{9}{4} \ frac{5}{4} times frac{8}{3} + frac{5}{4} times ( - y) = frac{9}{4} \ frac{5}{1} times frac{2}{3} + frac{5}{4} times ( - y) = frac{9}{4} \ frac{10}{3} + frac{5}{4} times ( - y) = frac{9}{4} \ frac{10}{3} - frac{5y}{4} = frac{9}{4} \ - frac{5y}{4} = - frac{10}{3} + frac{9}{4} \ - frac{5y}{4} = - frac{13}{12} \ - 5y times 12 = 4 times ( - 13) \ - 60y = - 52 \ y = - frac{52}{ - 60} \ y = frac{13}{15} .$
$2) : (11.25 - frac{41}{12} + 4.3 - frac{229}{30}) div \ div ( frac{91}{12} - frac{35}{6} ) = \ = frac{11.25 - frac{41}{12} + 4.3 - frac{229}{30} }{ frac{91}{12} - frac{35}{6} } = \ = frac{60 times (11.25 - frac{41}{12} + 4.3 - frac{229}{30} )}{60 times ( frac{91}{12} - frac{35}{6}) } = \ = frac{60 times 11.25 - 205 + 60 times 4.3 - }{455 - } \ frac{ -458 }{ - 350} = \ = frac{675 - 205 + 258 - 458}{105} = \ = frac{470 + 258 - 458}{105} = \ = frac{728 - 458}{105} = frac{270}{105} = 2.571$