Question

7/5x + 4/x при x = 0.9

Answer 1

7/5*0,9 + 4/0,9 = 7/4,5 + 4*0,9 = 7:45/10 + 4:9/10 =7*10/45 + 4*10/9 = 70/45 + 40/9 = 70/45 + 200/45 = 270/45 = 6

Answer 2

Вот, ня, обращайтесь