zad.1 (-x)*(-2/3) 21x/3 6x:(-4) 2/3x:3/2 zad.6 2(x+3) 5(3x-1) (-4)*(2a-b) -2(-4b+3) (a+b)*(-4) (4-5x+6y)*3 -3(3x-2) -1(3x-y+2) zad.7 (6x-2y):2 (-3a-1,5):(-3) (2,4a-1,6b):0,8 (4u-6v):(-1/2)

zad.1 (-x)*(-2/3)=2/3x 21x/3=7x 6x:(-4)=-3/2x 2/3x:3/2=2/3x*2/3=4/6x=2/3x zad.6 2(x+3)=2x+6 5(3x-1)=15x-5 (-4)*(2a-b)=-8a+4b -2(-4b+3)=8b-6 (a+b)*(-4)=-4a-4b (4-5x+6y)*3=12-15x+18y -3(3x-2)=-9x+6 -1(3x-y+2)=-3x+y-2 zad.7 (6x-2y):2=3x-y (-3a-1,5):(-3)=a+0,5 (2,4a-1,6b):0,8=3a-2 (4u-6v):(-1/2)=-8u+12v