104,2-х=5,04/1,2
104,2-х=4,2
х=100
5.04:(104.2-х)=1.2
(104.2-х)=5.04:1.2
(104.2-х)=4.2
х=104.2-4.2
5.04:(104.2-100)=1,2
104,2-х=5,04/1,2
104,2-х=4,2
х=100
5.04:(104.2-х)=1.2
(104.2-х)=5.04:1.2
(104.2-х)=4.2
х=104.2-4.2
х=100
5.04:(104.2-100)=1,2