Ответ:
Пошаговое объяснение:
1)
6x + 15 - 4x + 17 = 0
2x + 32 = 0
2x = -32
x = -32 : 2
x = -16
2)
-18y + 6 + 15y + 5 = 20
-3y + 11 = 20
-3y = 20 - 11
-3y = 9
y = 9:(-3)
y = -3
3)
54 - 12x + 28x + 21 = -23
16x + 75 = -23
16x = -23 - 75
16x = -98
x = -98 : 16
x = -6,125
4)
8x + 12 - 18 - 6x - x = -6
x - 6 = -6
x = -6+6
x = 0
5)
-9y + 36 + 8y + 24 + 23 = -9
-y + 83 = -9
y = 83+9
y = 92
6)
20y - 12 - 10 + 20y - 7 = -149
40y -29 = -149
40y = -149 + 29
40y = -120
y = -120 : 40
y = -3