Question

tìm x

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

Answer 1

=>|x+3/4|=3

=>x+3/4=-3 hoặc x+3/4=3

=>x=-15/4 hoặc x=9/4

Answer 2

\(=>\left|x+\dfrac{3}{4}\right|=3\)

\(=>\left[{}\begin{matrix}x+\dfrac{3}{4}=3\\x+\dfrac{3}{4}=-3\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{9}{4}\\-\dfrac{15}{4}\end{matrix}\right.\)

Answer 3

refer