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A. a-[a-(1-a)] B. -x-[-(1-x)-(x-1)] C. x-[y-(x-y)-x-(y-x)] D. 1-a-[1-(a-1)-2a-(1-3a)]-a-1
maniek135
A. = a-[a-1+a]= a-a+1-a=1-a B.=-x-[-1+x-x+1]=-x C.=x-[y-x+y-x-y+x]=x-(y-x)=x-y+x=2x-y D.=1-a-(1-a+1-2a-1+3a)-a-1=1-a-1-a-1=-1-2a
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janko1janko
A. a-[a-(1-a)]=a-[a-1+a]=a-2a+1=1-a B. -x-[-(1-x)-(x-1)]=-x-[-1+x-x+1]=-x C. x-[y-(x-y)-x-(y-x)]=x-[y-x+y-x-y+x]x-y+x=2x-y D. 1-a-[1-(a-1)-2a-(1-3a)]-a-1=1-a-[1-a+1-2a-1+3a]-a-1=1-a-1-a-1=-2a-1
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baszqa24
A. a-(a-1+a) = a-a+1-a = -a +1 B. -x-(-1+x-x+1)=-x+1-x+x-1=-x C. x-(y-x+y-x-y+x)=x-y+x-y+x+y-x=2x-y D. 1-a-(1-a+1-2a-1+3a)-a-1=1-a-1+a-1+2a+1-3a-a-1=-1-2a
B.=-x-[-1+x-x+1]=-x
C.=x-[y-x+y-x-y+x]=x-(y-x)=x-y+x=2x-y
D.=1-a-(1-a+1-2a-1+3a)-a-1=1-a-1-a-1=-1-2a
B. -x-[-(1-x)-(x-1)]=-x-[-1+x-x+1]=-x
C. x-[y-(x-y)-x-(y-x)]=x-[y-x+y-x-y+x]x-y+x=2x-y
D. 1-a-[1-(a-1)-2a-(1-3a)]-a-1=1-a-[1-a+1-2a-1+3a]-a-1=1-a-1-a-1=-2a-1
B. -x-(-1+x-x+1)=-x+1-x+x-1=-x
C. x-(y-x+y-x-y+x)=x-y+x-y+x+y-x=2x-y
D. 1-a-(1-a+1-2a-1+3a)-a-1=1-a-1+a-1+2a+1-3a-a-1=-1-2a