\(23+\frac{x}{35}+x=\frac{4}{5}\)
\(\frac{x}{35}+x=\frac{4}{5}-23=-\frac{111}{5}\)
\(\frac{x}{35}+\frac{35x}{35}=-\frac{111}{5}\)
\(\Rightarrow\frac{x\left(35+1\right)}{35}=-\frac{111}{5}\)
\(\Rightarrow\frac{x.36}{35}=-\frac{111}{5}\)
\(\Rightarrow x.36.5=35.\left(-111\right)\)
\(\Rightarrow x.180=-3885\)
\(\Rightarrow x=-3885:180=-\frac{259}{12}\)
Học tốt~~~