Răspuns :
a:b=4 rest 3
a+b=68
4b+3+b=68
5b=65
b=65:5
b=13
a+b=68
a+13=68
a=68-13
a=55
proba
55:13=4rest 3
a+b=68
4b+3+b=68
5b=65
b=65:5
b=13
a+b=68
a+13=68
a=68-13
a=55
proba
55:13=4rest 3