Solve the equations from Variant 1.

Вариант 1

1. \( 7 - 2x = 9 - 3x \)
   \( -2x + 3x = 9 - 7 \)
   \( x = 2 \)
2. \( 11x = 6 + 5(2x - 1) \)
   \( 11x = 6 + 10x - 5 \)
   \( 11x - 10x = 1 \)
   \( x = 1 \)
3. \( 6(2x - 3) - 3x = 2x - 4 \)
   \( 12x - 18 - 3x = 2x - 4 \)
   \( 9x - 18 = 2x - 4 \)
   \( 9x - 2x = 18 - 4 \)
   \( 7x = 14 \)
   \( x = 2 \)
4. \( 4(3x + 5) - 5(4x - 3) = 3 \)
   \( 12x + 20 - 20x + 15 = 3 \)
   \( -8x + 35 = 3 \)
   \( -8x = 3 - 35 \)
   \( -8x = -32 \)
   \( x = 4 \)
5. \( 5x - 3(4x - 1) = 7 - 2(7x - 3) \)
   \( 5x - 12x + 3 = 7 - 14x + 6 \)
   \( -7x + 3 = 13 - 14x \)
   \( -7x + 14x = 13 - 3 \)
   \( 7x = 10 \)
   \( x = \frac{10}{7} \)
6. \( -5.6(x - 3) + 2.1x = -3.5x \)
   \( -5.6x + 16.8 + 2.1x = -3.5x \)
   \( -3.5x + 16.8 = -3.5x \)
   \( 16.8 = 0 \)

Ответ: 1. x = 2; 2. x = 1; 3. x = 2; 4. x = 4; 5. x = 10/7; 6. Решений нет.