1)
x + (x+1) + (x+2) = 93x + 3 = 93x = 6x = 2
Ответ: x = 2
2)
(z-2) + (z-1) + z = -33z - 3 = -33z = 0z = 0
Ответ: z = 0
3)
21 + (20-4x) - (11-2x) = 021 + 20 - 4x - 11 + 2x = 030 - 4x - 11 + 2x = 0-2x + 19 = 0-2x = -19x = 19/2
Ответ: x = 19/2
1)
x + (x+1) + (x+2) = 9
3x + 3 = 9
3x = 6
x = 2
Ответ: x = 2
2)
(z-2) + (z-1) + z = -3
3z - 3 = -3
3z = 0
z = 0
Ответ: z = 0
3)
21 + (20-4x) - (11-2x) = 0
21 + 20 - 4x - 11 + 2x = 0
30 - 4x - 11 + 2x = 0
-2x + 19 = 0
-2x = -19
x = 19/2
Ответ: x = 19/2