1. 2x + 3 = x - 6
2x - x = -6 -3
x = -9
3. 5 - 3y = 4 - 2y
5 - 4 = -2y +3y
1 = y
4. 7 - 3x = 4x - 9
7 + 9 = 4x + 3x
16 = 7x
x = 16/7
6. 10y - 3 = 5 + 3y
10y - 3y = 5 + 3
7y = 8
y = 8/7
2. z = 4-3 = 2z
z = 1 = 2z
z = 2z z = 0
z = 1
Нет решений.
5. 6a-1 = 3a= 7
3a = 7 a = 7/3
6a - 1 = 3a a = 1/3
Нет решений.