Question

Giải ptrinh 

1x+1x+1x=11x+1+1x

Answer 1

\(x+x+x-11x-x=1\)

\(-9x=1\)

\(x=-\dfrac{1}{9}\)

Answer 2

\(\text{1x+1x+1x=11x+1+1x}\)

\(\Leftrightarrow x+x=11x+1\)

\(\Leftrightarrow2x=11x+1\)

\(\Leftrightarrow2x-11x=11x+1-11x\)

\(\Leftrightarrow-9x=1\)

\(\Leftrightarrow x=\dfrac{1}{-9}\)

\(x=\dfrac{-1}{9}\)