հանրահաշիվ

Առաջ․ 34 /ա, գ/
{x+ 2y — 3 = 0 {x = 3- 2y , x = 3- 2* 4 = -5
{x +y + 1 =0 {3 — 2y + y + 1= 0 , -y = -3 -1 , -y = -4 , y= 4 , ( -5 , 4)

{4x + y — 2 =0 {y = 2 — 4x , y = -18
{3x + y + 3 = 0 { 3x + 2 — 4x + 3 = 0 , -x = -5 , x =5 ( 5, -18 )

Առաջ․ 35 / ա, գ /

{x + 3y — 1 = 0 {x = 1- 3y , x= 1 +3 , x= 4
{-x + 4y + 8 = 0 { -1 +3y + 4y +8 = 0 , 7y = -7 y =-1 ( 4 , -1 )

{ x- y + 2 = 0 { x = y — 2 x = 2.5 — 2 = 0.5
{ 3x+ y — 4 = 0 { 3* ( y-2 ) + y -4 = 0 , 3y — 6 + y — 4 = 0 , 4y = 10 y = 2.5

Առաջ․ 36 /գ/

{ −6x + 2y + 6 = 0 { 2y = 6x — 6 y = 3x — 3 y = 3 * 7 — 3 = 18
{ 5x − y − 17 = 0 { 5x — 3x + 3 — 17 = 0 , 2x = 14 x = 7