Rozwiąż metodą algebraiczną układ równań: { x + 2y = 11 { 5x - 3y = 3

x+2y=11 5x-3y=3 x=11-2y 5(11-2y)-3y=3 x=11-2y 55-10y-3y=3 x=11-2y -13y=-52 / :-13 x=11-2y y=4 x=3 y=4

{ x + 2y = 11 { 5x - 3y = 3 {x = 11 - 2y {5 ( 11 - 2y) - 3y = 3 {x = 11 - 2y {55 - 10y - 3y = 3 {x = 11 - 2y {-13y = 3 - 55 {x = 11 - 2y {-13 y = -52 |(-13) {x = 11 - 2y {y = 4 {x = 11 - 2*4 {y = 4 {x = 11 - 8 {y = 4 {x = 3 {y = 4