Решите уравнение ребяяят помогите (тема: Решение дробных рациональных уравнений)  : 

1.(5x-8) / (х-1) =(14х+12) / (3x+5) 

2.1 / (х-4) -1 / x+ 6 = 5 / 28

3. 14 / (x² - 2x) - 21 / (x²+2x) = 5 / x 

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