(5080-X:5)*3=13935
5080-X:5 = 13935 : 3
5080-X:5 = 4645
Х : 5 = 5080 - 4645
Х : 5 = 435
Х = 435*5
х=2175
5080-х:5=13935:3
5080-х:5=4645
х:5=5080-4645
х:5=435
х=435х5
х=2175
(5080-2175:5)х3=13935
13935=13935
Рада была
(5080-X:5)*3=13935
5080-X:5 = 13935 : 3
5080-X:5 = 4645
Х : 5 = 5080 - 4645
Х : 5 = 435
Х = 435*5
х=2175