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Ե)

{2x+5y-15=0|*-3

{3x+2y-6=0|*2

{-6x-15y+45=0

{6x+4y-12=0

-6x-15y+45+6x+4y-12=0

-11y+33=0

11y-33=0

Y=33/11=3

Y=3

2x+15-15=0

x=0, y=3

Է)

{2x+4y-6=0

{3x-2y-25=0|*2

{2x+4y-6=0

{6x-4y-50=0

2x+4y-6+6x-4y-50=0

8x-56=0

X=56/8=7

x=7

14+4y-6=0

y=-2

x=7, y=-2

Զ)

{4x-5y-3=0|*3

{3x-2y-11=0|*-4

{12x-15y-9=0

{-12x+8y+44=0

12x-15y-9-12x+8y+44=0

-7y+35=0

7y-35=0

Y=35/7=5

Y=5

4x-25-3=0

X=28/4=7

X=7, Y=5

Ը)

{5x+3y-7=0|*5

{3x-5y-45=0|*3

{25x+15y-35=0

{9x-15y-135=0

25x+15y-35+9x-15y-135=0

34x-170=0

X=170/34=5

X=5

25+3y-7=0

Y=18/3=6

X=5, Y=6

Ա)

{4x+5y-2=0

{x-3y+8=0|*-4

{4x+5y-2=0

{-4x+12y-32=0

4x+5y-2-4x+12y-32=0

17y=34

Y=34/17=2

Y=2

4x+10-2=0

x=-2, y=2

Բ)

{6x-2y-6=0

{5x-y-7=0|*-2

{6x-2y-6=0

{-10x+2y+14=0

6x-2y-6-10x+2y+14=0

4x-8=0

X=8/4=2

X=2

12-2y-6=0

2y+6=0

Y=6/2=3

Y=3

X=2, y=3

Գ)

{2x+y-3=0|*-2

{3x+2y-5=0

{-4x-2y+6=0

{3x+2y-5=0

-4x-2y+6+3x+2y-5=0

-x+1=0

X=1

2+y-3=0

Y=1

x=1, y=1