пожалуйста помогите 1,8/х=180/200
2,5=100
Х      2

1,8/х = 180/200                           2,5/х = 100/2

180х = 1,8 * 200                         100х = 2,5 * 2

180х = 360                                  100х = 5 

х = 360 : 180                                х = 5 : 100

х = 2                                             х = 0,05

Проверка:                                    Проверка:

1,8 : 2 = 180 : 200                        2,5 : 0,05 = 100 : 2

0,9 = 0,9                                       50 = 50