a)3u+2v=2 5u+4v=6 b) 3s+5t= -6 1,5s-2t= -3 c) 3x+2y=13 2x+y=11 d) 5x+3y=0 -x -2y=7

mam nadzieje ze to sa uklady rownan:P a)3u+2v=2|*(-2) 5u+4v=6 -6u-4v=-4 5u+4v=6 ---------------- -1u=2|:(-1) u=-2 3*(-2)+2v=2 2v=8|:2 v=4 b) 3s+5t=-6 1,5s-2t=-3 |*(-2) 3s+5t=-6 -3,5s-10t=6 ----------------- -5t=0 t=0 s=-2 c) 3x+2y=13 2x+y=11|*(-2) 3x+2y=13 -4x-2y=-22 ---------------- -1x=-9 x=9 2y=13-27 2y=-14 y=-7 d) 5x+3y=0 -x -2y=7 |*5 5x+3y=0 -5x-10y=30 ----------------- -7y=30|:(-7) y=4cale i 2/7 x=3*(4cale i 2/7) x=12calych i 6/7

a 2v=2-3u 5u+4v=6 2v=2-3u 5u+4-6u=6 -1u=2 u=-2 2v=2-3u 2v=2-(-6) v=16 b 3s+5t= -6 1,5s-2t= -3 3s+5t=-6 1,5s=-3+2t 1,5s=-3+2t 6+4t+5t=-6 9t=0 t-=0 3s+5t=-6 3s+0=-6 s=-2 c 3x+2y=13 2x+y=11 y=11-2x 3x+22-4x=13 -x=-9 x=9 y=11-2x y=11-18 y=-7 d 5x+3y=0 -x -2y=7 x=-7+2y -35+13y=0 y=2¾ -x-2y=7 -x-5½=7 -x=12½