Question

\(\dfrac{2\dfrac{1}{2}x-1}{\dfrac{2}{3}}=\dfrac{-\dfrac{2}{3}}{1-2\dfrac{1}{2}x}\)

hu hu giúp vs, mai nộp rùi​​​

Answer 1

Tích chéo ta có:

\(-(2\frac{1}{2}x-1) ^2=-(\frac{2}{3})^2 \)

<=>\(2\frac{1}{2}x -1=\frac{2}{3} \)

<=>\(2\frac{1}{2}x =\frac{5}{3} \)

<=>\(\frac{5}{2}x=\frac{5}{3} \)

<=>\(x=\frac{5}{3}:\frac{5}{2} \)

<=>\(x=\frac{2}{3} \)

Answer 2

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