Răspuns :
a=785-479
a=306
c=785-429
c=356
a + c = 306+356 =662
b=785-662
b=123
a+b+c= 306+356+123=785
a=306
c=785-429
c=356
a + c = 306+356 =662
b=785-662
b=123
a+b+c= 306+356+123=785
a+429=785 → a=785-429=356;
479+c=785 → c=785-479=306 ;
356+b+306=785 → b=785-356-306=123
479+c=785 → c=785-479=306 ;
356+b+306=785 → b=785-356-306=123