\(\frac{1}{4}+x=\frac{5}{2}.\frac{8}{7}\)
\(\Rightarrow\frac{1}{4}+x=\frac{20}{7}\)
\(\Rightarrow x=\frac{20}{7}-\frac{1}{4}\)
\(\Rightarrow x=\frac{80}{28}-\frac{7}{28}\)
\(\Rightarrow x=\frac{73}{28}\)
1/4+x=5/2*8/7
1/4+x=20/7
x=20/7-1/4
x=80-7/28
x=73/28
\(\frac{1}{4}+x=\frac{5}{2}\times\frac{8}{7}\)
\(\frac{1}{4}+x=\frac{20}{7}\)
\(x=\frac{20}{7}-\frac{1}{4}\)
\(x=\frac{73}{28}\)
Vậy \(x=\frac{73}{28}\)
muỗi đốt ơi. Thế mà gọi là câu trả lời ấy hả ? .........!