6 - 2y = 8 - 3y
-2y + 3y = 8 - 6
y = 2
Ответ: (1; 2)
15x + 3 = 10x - 12
15x - 10x = -12 - 3
5x = -15
x = -3
Ответ: (-3; 2)
-5x - 11 = -6x - 12
-5x + 6x = -12 + 11
x = -1
Ответ: (-1; -1)
3x + 5 = 8x - 15
3x - 8x = -15 - 5
-5x = -20
x = 4
Ответ: (4; -1)
5(x + 3) = 27 + 3x
5x + 15 = 27 + 3x
5x - 3x = 27 - 15
2x = 12
x = 6
Ответ: (6; 2)
3y + (4 - 2y) = 6
3y + 4 - 2y = 6
y = 6 - 4
y = 2
Ответ: (1; 2)
5y - (13 + y) = y + 14
5y - 13 - y = y + 14
4y - 13 = y + 14
4y - y = 14 + 13
3y = 27
y = 9
Ответ: (1; 9)
3(2x - 4) - 2(x + 3) = -2
6x - 12 - 2x - 6 = -2
4x - 18 = -2
4x = 16
x = 4
Ответ: (4; 4)
4y - 3 = 2(7 - y) + 1
4y - 3 = 14 - 2y + 1
4y - 3 = 15 - 2y
4y + 2y = 15 + 3
6y = 18
y = 3
Ответ: (1; 3)