найдите решение системы уравнений способом подстановки

1) 5х-2(у+4)=0

    6(2х+3)-у=41

 

 

 

2) 2х+3(х+4)=11

    7(х+3у)-6х=-59

5 предложений о учителе.5 предложений о школе .1ккласс

к раствору 650 мл с массовой долей гидроксида натрия 40% и плотностью 1,44 г/мл прилили 250 мл воды. Определите массовую долю гидроксида натрия в полученном растворе?

Докажите что рассказ "Горбун" Артур Конан Дойл построен по всем законам детектива. Срочно помогите((((

переведите на русский только не с помощью переводчика сразу отмечу как нарушение заранее спасибо)

 On 1 November 1912 Scott and his expedition started to go to the Pole. The weather was very bad: it was cold and windy. Very quickly Scott understood that he had made a lot of mistakes. The sledges didn't work. The ponies couldn't walk in deep snow and soon died. Scott hadn't bought any dogs, and the men had to pull the sledges with their food and equipment. The team had never been to the Antarctic before, so they were not ready for all the difficulties. But they still didn't forget their dream. They wanted to be the first at the South Pole. Every day they walked and walked through the snow. The English expedition remembered Amundsen and didn't want to lose that race.