Verified answer

Ответ:

(11,2-x)+3,7 = 9,4

11.2-х = 9.4-3.7

11.2-х = 5.7

-х = -5.5

х = 5.5

_____________

(11.2-5.5)+3.7 = 9.4

 9.4=9.4

8,3-(7.2-х) = 5,4​

-(7.2-х) = -2.9

-7.2+х = -2.9

х = -2.9+7.2

х = 4.3

_____________

8.3-(7.2-4.3) = 5.4

 5.4=5.4