Răspuns :
a-b=659
a:b=8rest15
a=bx8+15
bx8+15-b=659
8b+15-b=659
8b-b=659-15
7b=644
b=644:7
b=92
a=92x8+15
a=751
a:b=8rest15
a=bx8+15
bx8+15-b=659
8b+15-b=659
8b-b=659-15
7b=644
b=644:7
b=92
a=92x8+15
a=751