Из равенства ((⁴²/₇₀) + (²/₇)) + F = ⁶⁹/₇₀ найдите значение F.

  1. ¹/₇₀
  2. ¹/₇
  3. 0,1
  4. 0,2

📝 Detailed explanation

Вычислим значение в скобках: ²/₇ = ²⁰/₇₀. Тогда ⁴²/₇₀ + ²⁰/₇₀ = ⁶²/₇₀. Из уравнения находим F: F = ⁶⁹/₇₀ − ⁶²/₇₀ = ⁷/₇₀ = ¹/₁₀ = 0,1.
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