Răspuns :
a-b=726
a: b= 7
a=7b
7b-b=726
6b=726
b=726:6
b=121
a=121x7 = 847
847-121= 726
847:121= 7
a: b= 7
a=7b
7b-b=726
6b=726
b=726:6
b=121
a=121x7 = 847
847-121= 726
847:121= 7
a:b=7
a-b=726
a=7b
7b-b=726
6b=726
b=726:6
b=121
a-121=726
a=121+726
a=847
Verificare:
847:121=7
847-121=726
a-b=726
a=7b
7b-b=726
6b=726
b=726:6
b=121
a-121=726
a=121+726
a=847
Verificare:
847:121=7
847-121=726