Oblicz : -1 i 1/2c * (-3 i 1/3) = 4/7a : 2/7 = (12x-4):4+1+x = -(20x-8):4 = -(x-2)-3(2x-4)+2(x-1) = 5y-3(y-1) = (2 i 1/2x- 1/4y):1/4 = (-2,7-0,9y):(-3) = 12a-6b: (-4) = PROSZĘ O POMOC DAJĘ NAJ !

-1 i 1/2c * (-3 i 1/3) = -3/2c*(-10/3)= -(-3/2c*10/3)= -(-5c)=5c 4/7a : 2/7 =2a (12x-4):4+1+x =12x/4-4/4+1+x=3x-1+1+x=3x+x=4x -(20x-8):4 = -(20x/4-8/4)= -(5x-2)= -5x+2 -(x-2)-3(2x-4)+2(x-1) = -x+2-(6x-12)+(x-1)= -x+2-6x+12+2(x-1)= -7x+2+12+(x-1)= = -7x+14+2x-2= -5x+14-2= -5x+12 5y-3(y-1) =5y-(3y-3)=5y-3y+3=2y+3 (2 i 1/2x- 1/4y):1/4 = (5/2x-1/4y):1/4=(2,5x-0,25y):0,25=2,5x/0,25 -0,25y/0,25= =10x-0,25y/0,25=10x-y (-2,7-0,9y):(-3) = -(-2,7-0,9y)/3= -(-2,7/3 -0,9y/3)= -(-0,9-0,3y)=0,9+0,3y 12a-6b: (-4) =12a-(-6b/4)=12a-(-1,5b)=12a+1,5b