а) (2a+5)-(3a-6) = 2a+5-3a+6 = -а+11
б) (5x-y)-(2y-x) = 5x-y-2y+x = 6x-3y
в) (a-2b-7)-(a-b-1) = a-2b-7-a+b+1 = -b-6
г) (2x+y-3)-(y-3+x) = 2x+y-3-y+3-x = x
а) (2a+5)-(3a-6) = 2a+5-3a+6 = -а+11 б) (5x-y)-(2y-x) = 5x-y-2y+x = 6x-3y в) (a-2b-7)-(a-b-1) = a-2b-7-a+b+1 = -b-6 г) (2x+y-3)-(y-3+x) = 2x+y-3-y+3-x = x
а) (2a+5)-(3a-6) = 2a+5-3a+6 = -а+11
б) (5x-y)-(2y-x) = 5x-y-2y+x = 6x-3y
в) (a-2b-7)-(a-b-1) = a-2b-7-a+b+1 = -b-6
г) (2x+y-3)-(y-3+x) = 2x+y-3-y+3-x = x
а) (2a+5)-(3a-6) = 2a+5-3a+6 = -а+11 б) (5x-y)-(2y-x) = 5x-y-2y+x = 6x-3y в) (a-2b-7)-(a-b-1) = a-2b-7-a+b+1 = -b-6 г) (2x+y-3)-(y-3+x) = 2x+y-3-y+3-x = x