34-38
ա)
{X+2y-3=0
X+y+1=0
X=0-2y+3
-2y+3+y+1=0
-y=-4
Y=4
X=-8+3
X=-5
բ)
{x-3y+3=0
X+y-1=0
X=0+3y-3
3y-3+y-1=0
3y-y=4
2y=4
Y=2
X=3•(2)-3
X=3
գ)
{4x+y-2=0
3x+y+3=0
Y=-4x+2
3x+(-4x)+2+3=0
3x-4x=-5
-x=-5
X=5
Y=-4•(5)+2=-18
Y=-18
դ)
{x-y-7=0
3x-y+1=0
X=y+7
3•(y+7)-y+1=0
3y+21-y+1=0
3y-y=-21-1
2y=-22
Y=-11
X=-11+7
X=-4
ա)
{x+3y-1=0
-x+4y+8=0
X=0+1-3y
0+1-3y+3y-1=0
3y=0-1+1
3y=0
0:3=0
Y=0
X+0-1=0
X=0+1-0
X=1
բ)
{x-2y+3=0
-x+3y-2=0
X=0-3-2y
0-3-2y-2y+3=0
2y=0+3-3
2y=0
0:2=0
x=0-3+0
x=-3
գ)
{x-y+2=0
3x+y-4=0
X=0-2+y
0-2+y-y+2=0
Y=0+2-2
Y=0
x-0+2=0
x=0-2+0
x=-2
դ)
{2x+y-3=0
-x-y+4=0
2X=0+3-y
0+3-y+y-3=0
Y=0-3+3
Y=0
2x+0-3=0
2x=0+3-0
2x=3
3:2=1.5
X=1.5
ա)
{x+2y-3=0
2x-3y+8=0
X=0+3-2y
0+3-2y+2y-3=0
2y=0-3+3
2y=0
0:2=0
Y=0
X+0-3=0
X=0+3-0
X=3
բ)
{2x+y-8=0
3x+4y-7=0
2X=0+8-y
0+8-y+y-8=0
Y=0-8+8
Y=0
2x+0-8=0
2x=0+8-0
2x=8
8:2=4
X=4
{-6x+2y+6=0
5x-y-17=0
-6x=0-6-2y
0-6-2y+2y+6=0
2y=0+6-6
2y=0
0:2=0
-6x+0+6=0
-6X=0-6-0
-6x=-6
-6:-6=1
X=1
դ)
{5x+3y-7=0
2x-y-5=0
5x=0+7-3y
0+7-3y+3y-7=0
3y=0-7+7
3y=0
0:3=0
Y=0
5x=0+7-0
5x=7
7:5=1.4
X=1.4
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