Question

x + 9/4 = 1/3 + 1/4 - 1/-5 - (-2/3) - (-1/4) + 4/5

giúp tớ với các bạn ơi

Answer 1

\(x+\frac{9}{4}=\frac{1}{3}+\frac{1}{4}-\frac{1}{-5}-\left(-\frac{2}{3}\right)-\left(-\frac{1}{4}\right)+\frac{4}{5}\)

\(x+\frac{9}{4}=\frac{1}{3}+\frac{1}{4}+\frac{1}{5}+\frac{2}{3}+\frac{1}{4}+\frac{4}{5}\)

\(x+\frac{9}{4}=\left(\frac{1}{3}+\frac{2}{3}\right)+\left(\frac{1}{4}+\frac{1}{4}\right)+\left(\frac{1}{5}+\frac{4}{5}\right)\)

\(x+\frac{9}{4}=1+\frac{1}{2}+1\)

\(x+\frac{9}{4}=\frac{5}{2}\)

\(x=\frac{5}{2}-\frac{9}{4}\)

\(x=\frac{1}{4}\)