Հանրահաշիվ
Ա)
{5x+y-7=0
{x-3y-11=0
{Y=7-5x
{x-21+15x-11=0
16x-32=0
X=32/16=2
10+y-7=0
Y=-3
X=2
Y=-3
Բ)
{2x+y-1=0
{3x+2y+5=0
{y=1-2x
{3x+2-4x+5=0
7-x=0
X=7
14+y-1=0
Y=-13
X=7
Y=-13
Գ)
{2x+y-7=0
{x-2y+4=0
{y=7-2x
{x-14+4x+4=0
5x-10=0
X=10/5=2
4+y-7=0
Y=3
X=2
Y=3
Դ)
{3x+y+5=0
{x-3y-5=0
{y=-5-3x
{x+15+9x-5=0
10x-10=0
X=10/10=1
X=1
3+y+5=0
Y=-8
X=1
Y=-8
Ե)
{x+2y-4=0
{3x+y+3=0
{x=4-2y
{12-6y+y+3=0
-5y=-12-3
5y=15
y=3
x=-2
Զ)
{5x+y-15=0
{x-2y-14=0
{y=15-5x
{x-30+10x-14=0
11x-44=0
X=44/11=4
X=4
20+y-15=0
Y=-5
X=4
Y=-5