А) y = x + 2
x + 2 + x = 10
2x=8 |: 2
x = 4
y = 4 + 2
x = 4
y = 6
x = 4
Б) y = 5 - 2x
-3x + 10 - 4x = - 4
- 7x = - 14 |:(-7)
x = 2
y = 5 - 4
x = 2
y = 1
x = 2
В) y = - 3 - 2x
-3 - 2x + 1 = 0
- 2x = 2 |:(-2)
x = - 1
y = - 3 + 2
x = - 1
y = - 1
x = - 1
