Răspuns :
Răspuns:
{2x+y=7 | ×3
{4x-3y=9
<=> {6x+3y=21
{4x-3y=9
________+
10x / = 30
=> x = 30/10 = 3
<=> {x=3
{2×3+y=7
6+y=7
y=7-6
y=1
=> S = {3,1}
Răspuns:
{2x+y=7 | ×3
{4x-3y=9
<=> {6x+3y=21
{4x-3y=9
________+
10x / = 30
=> x = 30/10 = 3
<=> {x=3
{2×3+y=7
6+y=7
y=7-6
y=1
=> S = {3,1}