Tìm x, biết: a) \(|x + \frac{1}{2021}| + |x + \frac{2}{2021}| + |x + \frac{3}{2021}| + \ldots + |x + \frac{2020}{2021}| = 2021x\)

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BTVN. Tìm x, biết:

a) \(|x + \frac{1}{2021}| + |x + \frac{2}{2021}| + |x + \frac{3}{2021}| + \ldots + |x + \frac{2020}{2021}| = 2021x\)

b) \(|x + \frac{1}{1.2}| + |x + \frac{1}{2.3}| + |x + \frac{1}{3.4}| + \ldots + |x + \frac{1}{2019.2020}| = 2020x\)

c) \(|x + \frac{1}{1.3}| + |x + \frac{1}{3.5}| + |x + \frac{1}{5.7}| + \ldots + |x + \frac{1}{197.199}| = 100x\)

d) \(|x + \frac{1}{2}| + |x + \frac{1}{6}| + |x + \frac{1}{12}| + \ldots + |x + \frac{1}{20}| + |x + \frac{1}{110}| = 11x\)