Question

-1 phần 2 - (x + 3 phần 4) = -5 phần 4

Answer 1

\(-\dfrac{1}{2}-\left(x+\dfrac{3}{4}\right)=-\dfrac{5}{4}\)

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

\(\Rightarrow-x=-\dfrac{5}{4}+\dfrac{1}{2}+\dfrac{3}{4}=-\dfrac{5}{4}+\dfrac{2}{4}+\dfrac{3}{4}=0\)

=> x = 0

Answer 2

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

⇒ \(\dfrac{-1}{2} - x-\dfrac{3}{4} = \dfrac{-5}{4} \)

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

⇒ \(( -x)-\dfrac{3}{4} = \dfrac{-3}{4}\)

⇒ \(-x= \dfrac{-3}{4}+\dfrac{3}{4} \)

⇒ \(x=0\)