Question

Answer 1

a: \(\Leftrightarrow x:\dfrac{1}{45}=\dfrac{1}{2}\)

hay x=1/90

b: \(\Leftrightarrow\dfrac{1}{2}:x=\dfrac{1}{5}-\dfrac{1}{3}=\dfrac{-2}{15}\)

hay \(x=-\dfrac{1}{2}:\dfrac{2}{15}=\dfrac{-15}{4}\)

c: =>x+1/2=0 hoặc x-3/4=0

=>x=-1/2 hoặc x=3/4

Answer 2

a x : \(\dfrac{1}{45}\) = \(\dfrac{1}{2}\)

x = \(\dfrac{1}{2}\)x\(\dfrac{1}{45}\)

x = \(\dfrac{1}{90}\)

b \(\dfrac{5}{6}\): x = \(\dfrac{1}{5}\)

x = \(\dfrac{1}{5}\)x\(\dfrac{5}{6}\)

x = \(\dfrac{1}{6}\)

c \(\left[{}\begin{matrix}x=\dfrac{3}{4}\\x=\dfrac{-1}{2}\end{matrix}\right.\)