Вариант 2. Реши уравнения: 1) a) 11 + 3x = 55 + 4x; б) -15 - 4x = -8x + 45; в) -8х - 17 = 3x - 105. 2) a) 2(y + 3) = 21 - 3y; б) (2 - c) + 3(c - 3) = -13; в) -3(1 - 3b) - 12 = 12.

Решение уравнений:

1. 1)
   • а)
     • \[ 11 + 3x = 55 + 4x \]
     • \[ 11 - 55 = 4x - 3x \]
     • \[ -44 = x \]
     • Ответ: \[ x = -44 \]
   • б)
     • \[ -15 - 4x = -8x + 45 \]
     • \[ -8x + 4x = -15 - 45 \]
     • \[ -4x = -60 \]
     • \[ x = \frac{-60}{-4} \]
     • \[ x = 15 \]
     • Ответ: The value of x is 15.
   • в)
     • \[ -8x - 17 = 3x - 105 \]
     • \[ -17 + 105 = 3x + 8x \]
     • \[ 88 = 11x \]
     • \[ x = \frac{88}{11} \]
     • \[ x = 8 \]
     • Ответ: The value of x is 8.
2. 2)
   • а)
     • \[ 2(y + 3) = 21 - 3y \]
     • \[ 2y + 6 = 21 - 3y \]
     • \[ 2y + 3y = 21 - 6 \]
     • \[ 5y = 15 \]
     • \[ y = \frac{15}{5} \]
     • \[ y = 3 \]
     • Ответ: The value of y is 3.
   • б)
     • \[ (2 - c) + 3(c - 3) = -13 \]
     • \[ 2 - c + 3c - 9 = -13 \]
     • \[ 2c - 7 = -13 \]
     • \[ 2c = -13 + 7 \]
     • \[ 2c = -6 \]
     • \[ c = \frac{-6}{2} \]
     • \[ c = -3 \]
     • Ответ: The value of c is -3.
   • в)
     • \[ -3(1 - 3b) - 12 = 12 \]
     • \[ -3 + 9b - 12 = 12 \]
     • \[ 9b - 15 = 12 \]
     • \[ 9b = 12 + 15 \]
     • \[ 9b = 27 \]
     • \[ b = \frac{27}{9} \]
     • \[ b = 3 \]
     • Ответ: The value of b is 3.