abc2 - 2abc = 2142
= > 2abc + 2214 = abc2
2000 + abc + 2214 = abc x 10 + 2
4212 + 2 + abc = abc x (9 + 1) + 2
4212 + 2 + abc = abc x 9 + abc + 2
4212 = abc x 9
abc = 486
abc2 - 2abc =2142
abc2-2abc=2142. abc=....?
Tìm số abc biết :
abc + ab,c = 184,8
abc2 - 2abc = 2142
abc9 + 5778 = 9abc
abc x 17 = 2abc
8abc - abc8 =3618
abc1 - 3105 = 1abc
abc x 9 = 6abc
2abc + 2214 = abc2
abc8 - 8abc = 522
tìm abc biết:
a) abc+ab,c=404,8 b) abc2 - 2abc=2142
abc2 - 2abc = 2142
ABC2-2ABC=5778
2abc+2214=abc2
Abc2-2abc=5773
3;a. tìm số abcx17=2abc
b; tìm số 2abc+2214=abc2
