Question

111,11:(21,45 - 9,7х) - 3,2 = 51

Answer 1

111,11:(21,45 - 9,7х)= 51+3.2
111,11:(21,45 - 9,7х)=54,2
21,45- 9,7х =111,11:54,2
21,45-9,7х = 2,05
9,7х = 21,45- 2,05
9,7= 19,4
х= 19,4:9,7
х= 2