3)a:b=3 (rest 3) si a+b=2023

Răspuns :

a=3b+3
a+b=2023
3b+3+b=2023
4b=2020
b=505
a=1518

a:b=3 rest 3   a=3b+3

a+b=2023

inlocuim necunoscutele:

3b+3+b=2023

4b+3=2023

4b=2020

b=505

a+505=2023

a=2023-505

a=1518

proba: 1518+505=2023