\(2\frac{1}{2}-x=\frac{5}{7}-\frac{4}{13}+\frac{1}{4}\)
=> \(\frac{5}{2}-x=\frac{260}{364}-\frac{112}{364}+\frac{91}{364}=\frac{260-112+91}{364}\)
=> \(\frac{5}{2}-x=\frac{239}{364}\)
=> \(x=\frac{5}{2}-\frac{239}{364}=\frac{910}{364}-\frac{239}{364}=\frac{671}{364}\)
\(2\frac{1}{2}-x=\frac{5}{7}-\frac{4}{13}+\frac{1}{4}\)
\(\frac{5}{2}-x=\) \(\frac{239}{364}\)
x= \(\frac{5}{2}-\frac{239}{364}\)
x=\(\frac{671}{364}\)
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Trả lời:
\(2\frac{1}{2}-x=\frac{5}{7}-\frac{4}{13}+\frac{1}{4}\)
\(\Leftrightarrow\frac{5}{2}-x=\frac{37}{91}+\frac{1}{4}\)
\(\Leftrightarrow\frac{5}{2}-x=\frac{239}{364}\)
\(\Leftrightarrow x=\frac{671}{364}\)
Vậy \(x=\frac{671}{364}\)
5/2-x=5/7-4/13+1/4
5/2-x=37/91+1/4
5/2-x=239/369
x=239/369+5/2
x=1149/369
vậy x=1149/369
