2. Решите уравнения: 1) a) 11 + 2x = 55 + 3x; б) -15 - 3x = -7x + 45; в) -3x – 17 = 8x – 105. 2) a) 2(2 + y) = 19 – 3y; б) (4 – c) + 2(c – 3) = -13; в) -3(3b + 1) – 12 = 12.

1) a) -x = 44, x = -44.
б) 4x = 60, x = 15.
в) -11x = -88, x = 8.
2) a) 4 + 2y = 19 - 3y, 5y = 15, y = 3.
б) 4 - c + 2c - 6 = -13, c - 2 = -13, c = -11.
в) -9b - 3 - 12 = 12, -9b = 27, b = -3.