Question

Rozwiąż układ równań :

2(x-1)-3(y+1)=0

(x+y)/2 \-(x-y)/3=1,5

Answer 1

{2(x-1)-3(y+1)=0

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

 

{2x-2-3y-3=0

{(x+y)/2 \-(x-y)/3=1,5  /*6

 

{2x-3y-5=0

{3(x+y)-2(x-y)=1,5*6

 

{2x-3y-5=0

{3x+3y-2x+2y=9

 

{2x-3y-5=0

{x+5y=9

 

{2x-3y-5=0

{x=9-5y

 

{2(9-5y)-3y-5=0

{x=9-5y

 

{18-10y-3y-5=0

{x=9-5y

 

{-13y=5-18

{x=9-5y

 

{-13y=-13

{x=9-5y

 

{y=1

{x=9-5*1

 

{y=1

{x=4