Răspunsuri

2014-05-29T14:52:01+03:00
Prin metoda substitutiei
4x=6+4y
x=(6+4y)/4
inlocuim in a doua ecuatie
3(6+4y)/4-2y=7
18+12y-8y=28
4y=28-18
4y=10
y=10/4=5/2

x=(6+4.5/2)/4=(6+10)/4=16/4=4

x=4  ,y=5/2