Răspuns :
a+b=487
a:b=3rest3
a=3b+3
3b+3+b=487
4b+3=487
4b=487-3
4b=484
b=484:4
b=121
a=3x121+3
a=363+3=366
verific 366+121=487
a:b=3rest3
a=3b+3
3b+3+b=487
4b+3=487
4b=487-3
4b=484
b=484:4
b=121
a=3x121+3
a=363+3=366
verific 366+121=487