Răspuns :
a-b=660
a:b=7r6
a=7b+6
7b+6-b=660
6b=660-66b=654
b=654:6
b=109
a=109x7+6a=769
a/../../../../../../../+6
b/../
a:b=7r6
a=7b+6
7b+6-b=660
6b=660-66b=654
b=654:6
b=109
a=109x7+6a=769
a/../../../../../../../+6
b/../
a-b=660
a:b=7 rest 6
a=7xb+6
7b+6-b=660 (am inlocuit in prima relatie)
6b=660-6
6b=654
b=654:6
b=109
a-109=660
a=660+109
a=769