Question

x+2 3-2y

---- - ---- = 3

4 3

x-y=3

Układy rownań

Answer 1

x+2      3-2y     

----   -  ------ =3  /* 12

4           3       

 

3(x+2 )  - 4(3-2y) = 3

x-y= 3

 

3x+6-12+8y= 3

x-y=3

 

3x+8y= 3-6+12

x-y=3

 

3x+8y= 15

x-y= 3 / * -3

 

3x-8y =15

-3x +3y= -9

 

-5y = 6 / :-5

 y = -1,2

 

x+ (-1,2) =3

x= 3 +1,2

x= 4,2