Rozwiąż układy równań metodą podstawiania 3x + 3y = -9 x + 5y = -3 w klamrze po lewej stronie ;] xd

{3x + 3y = -9 {x + 5y = -3 -> x = -3-5y { 3 (-3-5y) +3y = -9 {x = -3-5y {-9-15y +3y = -9 {x = -3-5y {-12y = -9+9 {x = -3-5y {-12y= 0 / : (-12) {x = -3-5y {y = 0 {x = -3-5y {y=0 {x = -3-5 *0 {y=0 {x = -3

3x + 3y = -9 x + 5y = -3 3x + 3y = -9 x= -3 -5y 3(-3 -3y) + 3y = -9 x= -3 -5y -9 -15y + 3y = -9 x = -3 -5y -12y=0 x=-3-5y y=0 x=-3