Răspuns :
X=UN NR
6X+19=CELALAT NR
AVEM ECUATIA:X+6X+19=166
7X=166-19
7X=147
X=21
RASPUNS:21,145
6X+19=CELALAT NR
AVEM ECUATIA:X+6X+19=166
7X=166-19
7X=147
X=21
RASPUNS:21,145
a+b=568
a:b=6,r=19 => a=6b+19
6b+19+b=568
7b+19=568/-19
7b=568-19
7b=549/:7
b=549:7
b=78
a+78=568/-78
a=568-78
a=490
a:b=6,r=19 => a=6b+19
6b+19+b=568
7b+19=568/-19
7b=568-19
7b=549/:7
b=549:7
b=78
a+78=568/-78
a=568-78
a=490