Question

Ajutorrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr✋✋✋✋✋✋✋✋✋✋✋✋✋✋✋✋✋✋✋✋✋✋✋✋✋✋✋✋Dau coroana!Ajutor

Answer 1

x =nr de prieteni 
y= nr de prajituri

x+2=y
2x -5 =y

x=y-2
2(y-2) -5=y    => y = 9

x+2=9  => x=7

R : 7 prieteni si 9 prajituri

Answer 2

Notam:
c = numarul de copii
p = numarul de prajituri

p = 1 × c + 2
p = 2 × c - 5
egalam cele doua relatii
2×c - 5 = 1×c + 2
2×c - c = 2 + 5
c = 7 copii
p = 1×7+2 = 9 (prajituri)