Bài 2. Tìm x, biết: a) \(\frac{x+1}{65} + \frac{x+3}{63} + \frac{x+5}{61} = \frac{x+7}{59};\) b) \(\frac{x-2}{7} + \frac{x-1}{8} = \frac{x-4}{5} + \frac{x-3}{6};\) c) \(\frac{x+1}{94} + \frac{x+2}{93} + \frac{x+3}{92} = \frac{x+4}{91} + \frac{x+5}{90} + \frac{x+6}{89};\) d) \(\frac{x-1}{59} + \frac{x-2}{58} + \frac{x-3}{57} = \frac{x-4}{56} + \frac{x-5}{55} + \frac{x-6}{54};\) e) \(\frac{59-x}{41} + \frac{57-x}{43} + \frac{55-x}{45} + \frac{53-x}{47} + \frac{51-x}{49} = -5;\) f) \(\frac{x-90}{10} + \frac{x-76}{12} + \frac{x-58}{14} + \frac{x-36}{16} + \frac{x-15}{17} = 15.\)

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Bài 2. Tìm x, biết:

a) \(\frac{x+1}{65} + \frac{x+3}{63} + \frac{x+5}{61} = \frac{x+7}{59};\)

b) \(\frac{x-2}{7} + \frac{x-1}{8} = \frac{x-4}{5} + \frac{x-3}{6};\)

c) \(\frac{x+1}{94} + \frac{x+2}{93} + \frac{x+3}{92} = \frac{x+4}{91} + \frac{x+5}{90} + \frac{x+6}{89};\)

d) \(\frac{x-1}{59} + \frac{x-2}{58} + \frac{x-3}{57} = \frac{x-4}{56} + \frac{x-5}{55} + \frac{x-6}{54};\)

e) \(\frac{59-x}{41} + \frac{57-x}{43} + \frac{55-x}{45} + \frac{53-x}{47} + \frac{51-x}{49} = -5;\)

f) \(\frac{x-90}{10} + \frac{x-76}{12} + \frac{x-58}{14} + \frac{x-36}{16} + \frac{x-15}{17} = 15.\)