Prosze! Rozwiąż układy równan: a) y+2-(3-x)=0 x-2=5-(2-y) b) 3(x-y)+4x=8 3(x-5y)=5=9y c) 3(2x-1)+4(y-2)=9 2(5x-1)+3y=5(3x+y)+2 d) 2(x+y)-3(x-2y=-7x-2 5(x+1)-2(3-y)=-4(x+y) e) 4(x+2) -3(y-1)=x+y-3

a) y+2-(3-x)=0 x-2=5-(2-y) y+2-3+x=0 x-2=5-2+y y+x=1 -y+x=3 + ---------------- 2x=4 x=2 y+2=1 y=-1 b) 3(x-y)+4x=8 3(x-5y)=5-9y(tu zrobiles blad pewnie chodzilo o 3(x-5y)=5-9y a nie o 3(x-5y)=5=9y) 3x-3y+4x=8 3x-15y=5-9y 7x-3y=8/*(-2) 3x-6y=5 -14x+6y=-16 3x-6y=5 + --------------------- -11x=-11 x=1 3*1-6y=5 -6y=2 y=-1/3 c) 3(2x-1)+4(y-2)=9 2(5x-1)+3y=5(3x+y)+2 6x-3+4y-8=9 10x-2+3y=15x+5y+2 6x+4y=20 -5x-2y=4/*2 6x+4y=20 -10x-4y=8 + ----------------- -4x=28 x=-7 6*(-7)+4y=20 -42+4y=20 4y=62 y=15.5 d) 2(x+y)-3(x-2y=-7x-2 5(x+1)-2(3-y)=-4(x+y) 2x+2y-3x+6y=-7x-2 5x+5-6+2y=-4x-4y 6x+8y=-2 9x+6y=1/*(-⅔) 6x+8y=-2 -6x-4y=-⅔ + -------------------- 4y=-2⅔ 4y=-8/3 y=-8/3*1/4 y=-⅔ 6x=10/3 x=5/9 e) 4(x+2) -3(y-1)=x+y-3 powinienes tu dokonczyc cale 2 rownanie przykro mi nie rozwiaze go;/