Question

ПОСМТРИТЕ НА КАРТИНКУ, ТАМ С ПТИЧКАМИ (ПОЖАЛУЙСТА)

Answer 1

$1) \frac{5}{2y+1} =\frac{15}{x-y}\\\\5(x-y)=15(2y+1)\\\\x-y=3(2y+1)\\\\x=6y+3+y=7y+3\\\\\\2)5\sqrt{6}+\frac{1}{5}\sqrt{150}=5\sqrt{6}+\frac{1}{5}\sqrt{25*6}=5\sqrt{6}+\frac{1}{5}*5\sqrt{6}=5\sqrt{6}+\sqrt{6}=6\sqrt{6}$