Question

[Thảo NGUYÊN]

hơi mờ ạ, thông cảmmm

Answer 1

[HT.Phong (9A5)]

a) \(1\dfrac{2}{3}-\left(\dfrac{1}{2}x-0,75\right)=-\dfrac{1}{6}\)

\(\Rightarrow\dfrac{5}{3}-\dfrac{1}{2}x+\dfrac{3}{4}=-\dfrac{1}{6}\)

\(\Rightarrow\dfrac{29}{12}-\dfrac{1}{2}x=-\dfrac{1}{6}\)

\(\Rightarrow\dfrac{1}{2}x=\dfrac{29}{12}+\dfrac{1}{6}\)

\(\Rightarrow\dfrac{1}{2}x=\dfrac{31}{12}\)

\(\Rightarrow x=\dfrac{31}{12}:\dfrac{1}{2}\)

\(\Rightarrow x=\dfrac{31}{6}\)

c) \(\left(x-1\dfrac{1}{2}\right)-\dfrac{3}{12}=\left(-\dfrac{1}{2}\right)^2\)

\(\Rightarrow\left(x-\dfrac{3}{2}\right)-\dfrac{3}{12}=\dfrac{1}{4}\)

\(\Rightarrow x-\dfrac{7}{4}=\dfrac{1}{4}\)

\(\Rightarrow x=\dfrac{1}{4}+\dfrac{7}{4}\)

\(\Rightarrow x=\dfrac{8}{4}\)

\(\Rightarrow x=2\)