Question

Am nevoie de ajutor la asta ​

Answer 1

Răspuns:

x+y=12=>x=12-y

inlocuim pe x in relatie

[2(12-y)+5y)]/[3(12-y)-2y=15/13

(24-2y+5y)/(36-3y-2y=15/13

(24+3y)/(36-5y)=15/13

13(24+3y)=15(36-5y)

312+39y=540-75y

114y=228=>y=228:114=>y=2

x=12-2=>x=10