Контрольные задания > Solve the following equations: 4) 6x - 19 = x - 10 5) 0.7 - 0.2x = 0.3x - 1.8 6) 0.1x + 9 = 0.2x - 4
Вопрос:

Solve the following equations: 4) 6x - 19 = x - 10 5) 0.7 - 0.2x = 0.3x - 1.8 6) 0.1x + 9 = 0.2x - 4

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Ответ:

Solution:

Equation 4:

  • 6x - 19 = x - 10
  • 6x - x = -10 + 19
  • 5x = 9
  • x = 9 / 5
  • x = 1.8

Equation 5:

  • 0.7 - 0.2x = 0.3x - 1.8
  • 0.7 + 1.8 = 0.3x + 0.2x
  • 2.5 = 0.5x
  • x = 2.5 / 0.5
  • x = 5

Equation 6:

  • 0.1x + 9 = 0.2x - 4
  • 9 + 4 = 0.2x - 0.1x
  • 13 = 0.1x
  • x = 13 / 0.1
  • x = 130

Final Answers:

  • Equation 4: x = 1.8
  • Equation 5: x = 5
  • Equation 6: x = 130
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