ta ghi ra giấy theo kiểu dọc thẳng ta duoc a = 2 b = 8 c = 6 ket qua la 286

8abc - abc8 = 5418

=> ( 8000 + abc ) - (abc x 10 + 8) = 5418

=> 8000 + abc - abc x 10 - 8 = 5418

=> 8000 - 8 - 5418 = abc x 10 - abc

=> 2574 = abc x 9

=> abc = 2574 : 9

=> abc = 286

8abc - abc8 = 5418

8000 + abc - abc x 10 + 8 = 5418

abc x (10 - 1)= 8000 - 8 - 5418

abc x (10 - 1) = 2574

abc = 2574 : 9

abc = 286

8abc - abc8 = 5418

8000 + abc - abc x 10 + 8 = 5418

abc x (10 - 1) = 8000 - 8 - 5418

abc x 9 = 2574

abc = 2574 : 9

abc = 286

kho.....................wa........................lanh.....................wa..................rich...................ung................ho..................minh...............cho.................do......................ret............to.............tich...............lai

a : 2 b :8 c :6

abc=246

ủng hộ tớ nha 

246 , ủng hộ mk nha

8abc - abc8 = 5418

8abc = abc8 + 5418

8000 + abc = abc x 10 + 8 + 5418

8000 - 8 - 5418 = abc x 10 - abc

2574 = abc x 9

abc = 2574 : 9 = 286

abc = (286).

a,abc7+5778=7abc

abc x 10+7+5778=7000+abc

abc x 10-abc=7000-5778-7

abc x (10-1)=1215

abc x 9=1215

abc=1215:9

abc=135

b,8abc-abc8=5418

8000+abc=5418+abc8

8000+abc-5418=abc x 10+8

8000-5418-8=abc x 10-abc

2574=abc x (10-1)

2574=abc x 9

2574:9=abc

abc=286

c,1abc=abc x 9

1000+abc=abc x 9

1000=abc x 9-abc

1000=abc x (9-1)

1000=abc x 8

abc=1000:8

abc=125

free fire HAYATO

8abc-abc8 = 5418

8abc= abc8 + 5418 

8000+abc= abc x 10 + 8 + 5418

8000 - 8 - 5418 = abc x 10 -abc

2574 = abc x 9

abc = 2574 : 9

abc = 286 

tk mk nha mk nhanh nhất

.....

8000 + abc - 10 x abc - 8 = 5418

7992 - 5418 = 10x abc - abc

2574 = 9 x abc

abc = 2574 : 9

abc = 286

vậy 8286 - 2868 = 5418