Question

5÷(5÷(х÷(-5)))=2 я не знаю

Answer 1

$5:(5:(x:(-5)))=2\\\\5:(x:(-5))=5:2\\\\5:(x:(-5))=2,5\\\\x:(-5)=5:2,5\\\\x:(-5)=2\\\\x=2*(-5)\\\\x=-10$

Проверка:

$5:(5:(-10:(-5)))=2\\\\5:(5:2)=2\\\\5:2,5=2\\\\2=2$