Rozwiąż układy równań metodą przeciwnych współczynników. 3u + 2v = 2 5u + 4v = 6 3s + 5t = -6 1,5s - 2t = -3

3u + 2v = 2 / * (-2) 5u + 4v = 6 -6u-4v=-4 + 5u+4v=6 ------------- -u=2 u=-2 -6+2v=2 2v=8 v=4 u=-2 v=4 2) 3s + 5t = -6 1,5s - 2t = -3 / * (-2) 3s+5t= - 6 + -3s+4t=6 ----------------- 9t=0 t=0 3s=-6 s=-2 t=0 s=-2

3u +2v = 2 /*(-2) 5u + 4v = 6 -6u -4v = -4 5u + 4v = 6 -u = 2 /:(-1) u = -2 3u +2v = 2 /*(-5) 5u + 4v = 6 /*3 -15u -10v= -10 15u +12v = 18 2v = 8 /:2 v = 4 u = -2 v = 4 _______________________________________________________ 3s + 5t = -6 1,5s - 2t = -3 /*(-2) 3s + 5t = -6 -3s + 4t = 6 9t = 0 /:9 t = 0 t= 0 3s + 5t = -6 t=0 3s = 5*0 =-6 t = 0 3s = -6 /:3 t = 0 s = -2