Tìm x biết
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a/ \(-\frac{1}{4} : x = -2 : \frac{1}{3}\)
b/ \(x : - = \frac{12}{99} \cdot \frac{15}{90}\)
c/ \(\frac{x-2}{10} = \frac{3}{15}\)
d/ \(\frac{2x+1}{-3} = \frac{-7}{11}\)
e/ \(\frac{x}{-15} = \frac{-60}{x}\)
g/ \(\frac{6}{x-3} = \frac{7}{x-5}\)
h/ \(\frac{x-2}{12} = \frac{3}{x-2}\)
i/ \(\frac{x-1}{x+5} = \frac{6}{7}\)
a/ \(-\frac{1}{4} : x = -2 : \frac{1}{3}\)
b/ \(x : - = \frac{12}{99} \cdot \frac{15}{90}\)
c/ \(\frac{x-2}{10} = \frac{3}{15}\)
d/ \(\frac{2x+1}{-3} = \frac{-7}{11}\)
e/ \(\frac{x}{-15} = \frac{-60}{x}\)
g/ \(\frac{6}{x-3} = \frac{7}{x-5}\)
h/ \(\frac{x-2}{12} = \frac{3}{x-2}\)
i/ \(\frac{x-1}{x+5} = \frac{6}{7}\)