ЗАДАНИЯ ИЗ ВПР

Задания из ВПР

1. \(16 - 7(5 - x) = 9\)
   \(16 - 35 + 7x = 9\)
   \(-19 + 7x = 9\)
   \(7x = 9 + 19\)
   \(7x = 28\)
   \(x = \frac{28}{7}\)
   \(x = 4\)
2. \(-5x - 11 - 2(4x - 2) = 0\)
   \(-5x - 11 - 8x + 4 = 0\)
   \(-13x - 7 = 0\)
   \(-13x = 7\)
   \(x = \frac{7}{-13}\)
   \(x = -\frac{7}{13}\)
3. \(5 - 12 - 5(4x - 1) = 0\)
   \(-7 - 20x + 5 = 0\)
   \(-2 - 20x = 0\)
   \(-20x = 2\)
   \(x = \frac{2}{-20}\)
   \(x = -0,1\)
4. \(10(2 - x) - 11x = -3x\)
   \(20 - 10x - 11x = -3x\)
   \(20 - 21x = -3x\)
   \(20 = -3x + 21x\)
   \(20 = 18x\)
   \(x = \frac{20}{18}\)
   \(x = \frac{10}{9}\)
5. \(5(x - 2,4) = 13x\)
   \(5x - 12 = 13x\)
   \(-12 = 13x - 5x\)
   \(-12 = 8x\)
   \(x = \frac{-12}{8}\)
   \(x = -1,5\)
6. \(5(x - 2,4) = 13x\)
   \(5x - 12 = 13x\)
   \(-12 = 8x\)
   \(x = -1,5\)
7. \(8x - 18 = 6x - 2(x - 5)\)
   \(8x - 18 = 6x - 2x + 10\)
   \(8x - 18 = 4x + 10\)
   \(8x - 4x = 10 + 18\)
   \(4x = 28\)
   \(x = \frac{28}{4}\)
   \(x = 7\)
8. \((7x - 8) - (2x - 5) = 17\)
   \(7x - 8 - 2x + 5 = 17\)
   \(5x - 3 = 17\)
   \(5x = 17 + 3\)
   \(5x = 20\)
   \(x = \frac{20}{5}\)
   \(x = 4\)

Ответ: 4; -7/13; -0,1; 10/9; -1,5; -1,5; 7; 4.