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5x
-3x
-3x
3a+1
-1a-3
a+7b
8b-6a
nie wiem
2y
-4y
-5a
3x+2x= 5x
6x-x=5x
-8x+5x= -3x
x-4x= -3x
B.
2a+1+a= 3a+1
4a-5a-3= -a-3
-5a+7b+6a= a+7b
6b+6a+2b= 8b+2a
5x
-3x
3x
b)4a
-3a
7ab
2a
c)nie wiem