34
Ա) {x+2y-3 = 0
{x+y+1 = 0
——————-
y-4 = 0
y = 4
x = -5
(-5;4)
Բ) {x-3y+3 = 0
{x+y-1 = 0
-4y+4 = 0
-4y = -4
y = 1
x = 0
(0;1)
Գ) {4x+y-2 = 0
{3x+y+3 = 0
x-5 = 0
x = 5
y = -18
(5;-18)
Դ) {x-y-7 = 0
{3x-y+1 = 0
-2x-8 = 0
-2x = 8
x = -4
y = -11
(-4;-11)
35
Ա) {x+3y-1 = 0
{-x+4y+8 = 0
7y+7 = 0
7y = -7
y = -1
x = 4
(4;-1)
Բ) {x-2y+3 = 0
{-x+3y-2 = 0
y+1 = 0
y = -1
x = -5
(-5;-1)
Գ) {x-y+2 = 0
{3x+y-4 = 0
4x-2 = 0
4x = 2
x = 0,5
y = 2,5
(0,5;2,5)
Դ) {2x+y-3 = 0
{-x-y+4 = 0
x+1 = 0
x = -1
y = 5
(-1;5)
36
Ա) {x+2y-3 = 0 |•2
{2x-3y+8 = 0 |
{2x+4y-6 = 0
{2x-3y+8 = 0
7y-14 = 0
7y = 14
y = 2
x = -1
(-1;2)
Գ) {-6x+2y+6 = 0 |
{5x-y-17 = 0 |•2
{-6x+2y+6 = 0
{10x-2y-34 = 0
4x-28 = 0
4x = 28
x = 7
y = 18 (7;18)
Անի Քարամյան,Ավագ դպրոց,9-րդ դասարան 