Question

stiind ca 3·x+2·y=17 si 2·x+2·y=13 determinati x

Answer 1

3x+2y= 17; 2x+2y= 13-> x= 13*2y/2=>x= 13y; inlocuim in prima adunare si avem 3*13y+2y=17-> 39y+2y= 17-> 41y=17-> y= 0.(41463)-> x= 5.(39024)