Hej, pomoże ktoś z tym zadaniem {x+3y=1 {4x-y=5 {x= .. {y= ...

{x+3y=1 {4x-y=5/*3 {x+3y=1 {12x-3y=15 ------------------ x+12x=1+15 13x=16/:13 x=16/13 x=1 3/13 x+3y=1 1 3/13+3y=1 3y=1-1 3/13 3y= -3/13/:3 y= -3/13*1/3 y= -1/13

x+3y=1  4x-y=5  /*3 x+3y=1 12x-3y=15 -------------- + 13x=16 x=16/13 16/13+3y=1 3y=1-16/13 3y=-3/13  /:3 y=-1/13 Odp. x=16/13 y=-1/13