A) \(-\frac{2}{7} + \frac{2}{7} : \frac{3}{5}\) b) \(-\frac{8}{19} + -\frac{4}{21} - \frac{17}{21} + \frac{27}{19}\) c) \(6 \frac{3}{5} - 6 \frac{16}{13}\) --- a) \(x - \frac{2}{3} = \frac{-5}{12}\) b) \(\frac{8}{5} : x = \frac{-2}{3}\) c) \(1 - \frac{3}{7} x = \frac{-2}{7}\)

Câu 1(bên trái): Thực hiện phép tính (tính hợp lý nếu có thể)
Câu 2 (bên phải): Tìm x, biết:
a) \(-\frac{2}{7} + \frac{2}{7} : \frac{3}{5}\)
b) \(-\frac{8}{19} + -\frac{4}{21} - \frac{17}{21} + \frac{27}{19}\)
c) \(6 \frac{3}{5} - 6 \frac{16}{13}\)
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a) \(x - \frac{2}{3} = \frac{-5}{12}\)
b) \(\frac{8}{5} : x = \frac{-2}{3}\)
c) \(1 - \frac{3}{7} x = \frac{-2}{7}\)