x - 7/5 = 5/6 : 5/7
x - 7/5 = 7/6
x = 7/6 + 7/5
x = 77/30
5/6:(X-7/5)=5/7
X-7/5=5/6:5/7
X-7/5=5/6*7/5
X-7/5=7/6
X=7/6+7/5
X=77/30
NẾU THẤY ĐÚNG THÌ K CHO MH NHA CÁC BẠN
\(x-\frac{7}{5}=\frac{5}{6}:\frac{5}{7}\)
\(x-\frac{7}{5}=\frac{7}{6}\)
\(x=\frac{7}{6}+\frac{7}{5}\)
\(x=\frac{77}{30}\)
77/30 mình chắn chắn đúng hãy nhé