А) -6, 4-(-x-6, 4) = -6, 4+x+6, 4 = x
Б) -15•y-(-20+3•b-6•x) = -15y+20-3b+6x
В) -a-(-8-a-b) = -a+8+a+b = 8+b
Г) 9, 6-(-x+9, 6+y) = 9, 6+x-9, 6-y = x-y
Д) -(a-b)+(x-b) = -a+b+x-b = x-a
Е) -x-(-y+x)+(y-c) = -x+y-x+y-c = 2y-c
Ж) -28-(a-13+b)-(в-a) = -28-a+13-b-в+a = -28-в-13-а+b+а = -41-в+b
А) -6, 4-(-x-6, 4) = -6, 4+x+6, 4 = x
Б) -15•y-(-20+3•b-6•x) = -15y+20-3b+6x
В) -a-(-8-a-b) = -a+8+a+b = 8+b
Г) 9, 6-(-x+9, 6+y) = 9, 6+x-9, 6-y = x-y
Д) -(a-b)+(x-b) = -a+b+x-b = x-a
Е) -x-(-y+x)+(y-c) = -x+y-x+y-c = 2y-c
Ж) -28-(a-13+b)-(в-a) = -28-a+13-b-в+a = -28-в-13-а+b+а = -41-в+b