Question

Tìm x, biết:

\(x:3-x=\frac{-13}{3}\)

giai đầy đủ giùm

Answer 1

\(x:3-x=\frac{-13}{3}\)

\(\Leftrightarrow\frac{x}{3}-x=\frac{-13}{3}\)

\(\Leftrightarrow\frac{x}{3}-\frac{3x}{3}=\frac{-13}{3}\)

\(\Leftrightarrow\frac{-2x}{3}=\frac{-13}{3}\)

\(\Rightarrow-2x=-13\)

\(\Rightarrow2x=13\)

\(\Rightarrow x=13:2=\frac{13}{2}\)

Answer 2

\(\Leftrightarrow\frac{x}{3}=\frac{-13}{3}+x\)

\(\Leftrightarrow\frac{x}{3}=\frac{-13+3x}{3}\)

\(\Leftrightarrow x=-13+3x\)

\(\Leftrightarrow x-3x=-13\)

\(\Leftrightarrow-2x=-13\)

\(\Leftrightarrow x=\frac{13}{2}\)