Решение уравнений:

• a) $$-3(2-x) = 5x$$
  $$-6 + 3x = 5x$$
  $$3x - 5x = 6$$
  $$-2x = 6$$
  $$x = \frac{6}{-2}$$
  $$x = -3$$
  Ответ: $$x = -3$$.
• б) $$4(x + 9) - 8x = 26 - 2x$$
  $$4x + 36 - 8x = 26 - 2x$$
  $$4x - 8x + 2x = 26 - 36$$
  $$-2x = -10$$
  $$x = \frac{-10}{-2}$$
  $$x = 5$$
  Ответ: $$x = 5$$.