abc2 + 2abc = ?
abc2 + 423 = 2abc
abc2 + 423 = 2abc
abc x 10 + 2 + 423 = 2000 + abc
abc x 10 - abc x 1 = 2000 - 423 - 2
abc x 9 = 1575
abc = 1575 : 9
abc = 175
Giải hộ mình nha nhớ giải chi tiết đó
abc2+423=2abc
abcx10+2+423=2000+abc
abcx10-abc=2000-425
abcx9=1575
abc=1575/9=175
abc2 + 423 = 2abc
<=> abc * 10 + 2 + 423 = 2000 + abc
<=> abc * 10 -abc = 2000 - 425
<=> abc * 9 = 1575
=> abc = 1575 : 9
=> abc = 175
Vậy abc = 175
ABC2-2ABC=5778
abc2 -2abc =5778
abcx10+2-abc+2000=5778
abc x 10+2-abc=5778+2000
abc x 10- abc + 2=7778
abc x 9=7778-2
abc x 9=7776
abc=7776:9
abc=864
Vay abc=864
abc2+423=2abc
2abc+2214=abc2
abc2+423=2abc
abc2 + 423 = 2abc
abc x 10 + 2 + 423 = 2000 + abc
abc x 10 - abc = 2000 - 423 - 2
abc x (10-1) = 1575
abc = 1575 : 9
abc = 175
abc2 + 423 = 2abc
abc2 - 2abc =2142
abc2- 2abc = 2142
abc x 10 + 2 - abc + 2000 = 2142
abc x 10 + 2 - abc = 2142 + 2000
abc x 10 + 2 - abc = 4142
abc x 9 = 4142 - 2
abc x 9 = 4140
abc = 4140 : 9
abc = 460
Vậy abc = 460
2-c=2 => c=0
ab02-2ab0=2142
0-b=4 (nhớ 1) => b=6
a602-2a60=2142
5-a=1 => a=4
nên abc=460
Abc2-2abc=5773