Use the pictures and the text to make a speech to your classmates about the importance of being a global citize we need to be good citizens to make our community better for everyone. 3
Пусть скорость пароплана в стоячей воде - x ⇒ 48/(x+4)+48/(x-4)=5 48x-192+48x+192=5*(x-4)*(x+4) 96x=5x²-80 5x²-96x-80=0 d=10816 x₁=20 x₂=-0,8 ∉ ответ: скорость пароплана в стоячей воде 20 км/ч.