Question

suma a doua nr e 23.daca al doilea nr e cu 3 mai mare decat primul afla cele 2 nr

Answer 1

a+b=23;
⇒b=a+3;
⇒a+a+3=23
⇒2a=23-3
⇒2a=20
⇒a=10;
⇒b=10+3
⇒b=13;

Answer 2

a |-----|
b |-----|-3-|
}23
23-3=20 (2 parti)
20:2=10 (a)
10+3=13 (b)