Question

11/118 - Matematyka z plusem

rozwiaz uklad rownan:

a){ (x-3)/4-(y+5)/2=-1,5

{ (x-3)/2 -(2y-7)/3=1

Answer 1

{ (x-3)/4-(y+5)/2=-1,5|*4

{ (x-3)/2 -(2y-7)/3=1 |*6

 

{x-3-2*(y+5)=-6

{3(x-3)-2(2y-7)=6

 

{x-3-2y-10=-6

{3x-9-4y+14=6

 

{x=-6+3+2y+10

{3x-9-4y=6+9-14

 

{x=2y+7

{3(2y+7)-4y=1

 

{x=2y+7

{6y+21-4y=1

 

{x=2y+7

{2y=-20|:2

 

{x=2y+7

{y=-10

 

{x=2*(-10)+7

{y=-10

 

{x=-13

{y=-10