Question

\(\dfrac{x+3}{1995}\)+\(\dfrac{x+1}{1997}\)=-2

Giải nhanh giùm mk nha!!!

Answer 1

\(\Leftrightarrow\dfrac{x+3}{1995}+1+\dfrac{x+1}{1997}+1=0\)

\(\Leftrightarrow\dfrac{x+3+1995}{1995}+\dfrac{x+1+1997}{1997}=0\)

\(\Leftrightarrow\dfrac{x+1998}{1995}+\dfrac{x+1998}{1997}=0\)

\(\Leftrightarrow\left(x+1998\right)\left(\dfrac{1}{1995}+\dfrac{1}{1997}\right)=0\)

\(\Leftrightarrow x+1998=0\)(vì \(\dfrac{1}{1995}+\dfrac{1}{1997}\ne0)\)

\(\Leftrightarrow x=-1998\)