3x+2y= 13 2x+y=11/*-2 3x+2y= 13 -4x-2y=-22 -1x=-9 x=9 2*9+y=11 18+y=11 y=-7 5x+3y= 0 -x-2y= 7/*5 5x+3y= 0 -5x-10y=35 -7y=35 y=-5 5x-15=0 x=3 3u+2v= 2/*-2 5u+4v= 6 -6u-4v=-4 5u+4v= 6 -u=2 u=-2 6+2v=2 2v=2-6 2v=-4 v=-2 3s+5t= -6 1,5s-2t= -3/*-2 3s+5t= -6 -3s+4t=6 9t=0 t=0 3s+0=-6 3s=-6 s=-2 5= 3x-y/*-2 5x-2y= 7 -6x+2y=-10 5x-2y=7 -x=-3 x=3 15-2y=7 -2y=-8 y=4 x-3y= 5/*-3 y+3x= -5 -3x+9y=-15 y+3x= -5 10y=-20 y=-2 x-2*-3=5 x+6=5 x=-1
3x+2y= 13 2x+y=11/*-2 3x+2y=13 -4x-2y=-22 -x=9/:-1 x=-9 3*(-9)+2y=1 x=-9 -27+2y=1 x=-9 2y=1+27 x=-9 y=28/:2 x=-9 y=14 5x+3y= 0 -x-2y= 7/*5 5x+3y=0 -5x-10y=35 -7y=35/:-7 y=-5 5x+3*(-5)=0 y=-5 5x-15=0 y=-5 5x=0+15 y=-5 x=15/:5 y=-5 x=3 3u+2v= 2 /*-2 5u+4v= 6 -6u-4v=-4 5u+4v=6 -1u=2/:-1 u=-2 3*(-2)+2v=2 u=-2 -6+2v=2 u=-2 2v=2+6 u=-2 v=8/:2 u=-2 v=4 3s+5t= -6 1,5s-2t= -3/*-2 3s+5t=-6 -3s+4t=6 9t=0/:9 t=0 3s+5*0=-6 t=0 3s+0=-6 t=0 3s=-6/:3 t=0 s=-2 5= 3x-y 5x-2y= 7 -3x+y=-5/*2 5x-2y=7 -6x+2y=-10 5x-2y=7 -x=-3/:-1 x=3 5=3*3-y x=3 5=9-y x=3 y=9-5 x=3 y=4 x-3y= 5 y+3x= -5/*3 x-3y=5 3y+9x=-15 10x=-10/:10 x=-1 -1-3y=5 x=-1 -3y=5+1 x=-1 y=6/:-3 x=-1 y=-2
3x+2y= 13 2x+y=11/* -2 3x+2y=13 -4x-2y=-26 -x=13/ * -1 x=13 3*13+2y=13 39+2y=13 2y=13-39 y= -26 5x+3y= 0 -x-2y= 7/ *5 5x+3y= 0 -5x-10y=35 -7y=35/: -7 y=5 5x+3y= 0 5x+3*5=0 5x+15=0 5x=-15/: 5 x=-3 3u+2v= 2/* -2 5u+4v= 6 -6u-4v=-4 5u+4v= 6 -u=2 u=-2 5u+4v= 6 5* -2+4v=6 -10+4v=6 4v=16/4 v=4 3s+5t= -6 1,5s-2t= -3/*2 3s+5t= -6 3s-4t=-6/* -1 3s+5t= -6 -3s+4t=6 9t=0 t=-9 3s+5t= -6 3s+5* -9=-6 3s-45=-6 3s=-6+45 s=13
