a) Ư\(_{\left(60\right)}\)= 4; 12; 30; 60

b) B\(_{\left(4\right)}\)= 4; 12; 16; 60; 68

c) \(\dfrac{5}{6}+\dfrac{3}{4}.x=\dfrac{5}{24}\)

\(\dfrac{3}{4}.x=\dfrac{5}{24}-\dfrac{5}{6}\)

\(\dfrac{3}{4}.x=\dfrac{-5}{8}\)

\(x=\dfrac{-5}{8}:\dfrac{3}{4}\)

\(x=\dfrac{-5}{6}\)

Bài 2:

a) \(x-\dfrac{3}{4}=-\dfrac{5}{8}\)

    \(x=-\dfrac{5}{8}-\dfrac{3}{4}\)

    \(x=-\dfrac{11}{8}\)

b) \(x+\dfrac{5}{8}=\dfrac{-1}{4}\)

     \(x=\dfrac{-1}{4}-\dfrac{5}{8}\)

     \(x=\dfrac{-7}{8}\)

\(4^{x+2}-3.4^x=832\)

\(\left(4-3.4\right)^{x+2}=832\)

\(-8^{x+2}=832\)

\(^{x+2}=832:\left(-8\right)\)

\(^{x+2}=-104\)

\(^x=-104-2\)

\(^x=-106\)