1. Решите уравнения: a) 13x-26 = -130; 6) 5x - 3 = 3x - 11; B) 24(x+2) = 6(x-4); г) 2/3 x + 1 = 1/2 x + 1/6

Решение:

• a) 13x - 26 = -130
  • 13x = -130 + 26
  • 13x = -104
  • x = -104 / 13
  • x = -8
• б) 5x - 3 = 3x - 11
  • 5x - 3x = -11 + 3
  • 2x = -8
  • x = -8 / 2
  • x = -4
• в) 24(x + 2) = 6(x - 4)
  • 24x + 48 = 6x - 24
  • 24x - 6x = -24 - 48
  • 18x = -72
  • x = -72 / 18
  • x = -4
• г) 2/3 x + 1 = 1/2 x + 1/6
  • (2/3 - 1/2)x = 1/6 - 1
  • (4/6 - 3/6)x = 1/6 - 6/6
  • 1/6 x = -5/6
  • x = (-5/6) / (1/6)
  • x = -5

Ответ: а) -8; б) -4; в) -4; г) -5