Question

aflati a+b+c stiind ca abc+bca+cab=1443​

Answer 1

Răspuns:

a+b+c=?

abc+bca+cab=1443

______________

==> 100a+10b+c+100b+10c+a+100c+10a+b=1443

==>111a+111b+111c=1443/:111

==>a+b+c=13

Answer 2

Răspuns:

Explicație pas cu pas:

___    ___   ___

abc + bca + cab = 1443

(100a+10b+c) + (100b+10c+a) + (100c+10a+b) = 1443

(100a+10a+a) + ( 100b+10b+b) + (100c+10c+c) = 1443

111 a + 111 b + 111 c = 1443

111 × ( a + b + c ) = 1443

a + b + c = 1443 : 111

a + b + c = 13