3s+5t=-6 1,5s-2t=-3 ___________

3s+5t=-6 1,5s-2t=-3/*(-2) 3s+5t=-6 -3s+4t=6 ___________ 3s+5t-3s+4t=-6+6 9t=0 t=0 3s+5*0=-6 3s=-6/:3 s=-2

3s+5t=-6 1,5s-2t=-3 / *-2 3s+5t=-6 -3s + 4t =6 doddajemy i wychodzi 9t = 0 t = 0 3 s= -6/ :3 s = -2

3s+5t=-6 1,5s-2t=-3 /*2 3s+5t=-6 -3s+4t=6 0+9t=0 9t=0 / :9 t=0 3s+5*0=-6 3s=-6 s=-2 s=-2 t=0