1. a)2a+(3a-7)= b)x-(2x-3)= c)3x-(y-2x)= d)-(3a+6)-4= 2. A= 3x-y B= x-1 C= -3x-x A-(B-C)= 3. Wykonaj działania: a) a+(a-b)= b) 2x-(x+4)= c) 7-(-x+6)= d) -(x+4)=(x-5)= e) 1-(t+p)-(t-2)= f) -(-y+2)+(-2y-4)= :D

1. 2a+(3a-7)=2a+3a-7=5a-7 x-(2x-3)=x-2x+3=-x+3 3x-(y-2x)=3x-y+2x=5x-y -(3a+6)-4=-3a-6-4=-3a-10

a) 2a + (3a - 7)=2a+3a-7=5a-7 b)x- (2x-3)=x-2x+3=-x+3 c)3x - (y - 2x)=3x-y+2x=5x-y d) -(3a + 6) - 4=-3a-6-4=-3a-10 a) 3x-y+x-1=4x-y-1 b) 3x-y+x-1+3x-y=7x-2y-1 c) 3x-y-x-1+3x-y=5x-2y-1 d) 3x-y(-x-1+3x-y)=3x-y+2x-1-y=5x-2y-1 a)a+(a-b) = a+a-b = 2a-b b)2x-(x+4) = 2x-x-4 = x-4 c)7-(-x+6)=7+x-6 = 1+x d)-(x+4)+(x-5) = -x-4 + x-5 = -9 e)1-(t+p)-(t-2) = 1-t -p-t+2 = 3-2t-p f)-(-y+2)+(-2y-4) = y-2-2y-4=-y-6

1 a)2a+(3a-7)=2a-3a+7= -a +7 b)x-(2x-3)=x+2x+3=3x+3 c)3x-(y-2x)=3x+y+2x=5x+y d)-(3a+6)-4=-3a-6-4=-3a-10 2 A-(B-C)=3x-y-(x-1-(-3x-x))=3x-y-(x-1+3x+x)=3x-y+x+1-3x-x=-y+1 3 a) a+(a-b)=a+a-b=2a-b b) 2x-(x+4)=2x+x-4=3x-4 c) 7-(-x+6)=7+x-6= 1+x e) 1-(t+p)-(t-2)=1+t-p+t+2=2t+3-p f) -(-y+2)+(-2y-4)=y-2-2y-4=-y-6