câu 1 . tìm x
a. \(x:3\dfrac{1}{15}=1\dfrac{1}{2}\)
b.\(x.\dfrac{3}{2}=\dfrac{-7}{6}\)
c. \(\dfrac{5}{6}+\dfrac{1}{4}:x=\dfrac{-2}{3}\)
d. \(\dfrac{-2}{13}.x=\dfrac{-9}{26}\)
e. \(\dfrac{1}{2}.x-\dfrac{1}{10}=\dfrac{2}{3}\)
f.\(-52+\dfrac{2}{3}.x=-46\)
a. \(x:3\dfrac{1}{15}=1\dfrac{1}{2}\)
\(x:\dfrac{46}{15}=\dfrac{3}{2}\)
\(x=\dfrac{3}{2}.\dfrac{46}{15}=\dfrac{23}{5}\)
b. \(x.\dfrac{3}{2}=-\dfrac{7}{6}\)
\(x=-\dfrac{7}{6}:\dfrac{3}{2}=-\dfrac{7}{9}\)
c. \(\dfrac{5}{6}+\dfrac{1}{4}:x=-\dfrac{2}{3}\)
\(\dfrac{13}{12}:x=-\dfrac{2}{3}\)
\(x=\dfrac{13}{12}:\left(-\dfrac{2}{3}\right)=-\dfrac{13}{8}\)
Còn lại tương tự thôi
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lm mấy câu còn lại đi bn