Câu trả lời:
\(x\dfrac{x}{15}=\dfrac{112}{5}\)
\(\Rightarrow\dfrac{x\cdot15+x}{15}=\dfrac{112}{15}\)
\(\Rightarrow\dfrac{x\left(15+1\right)}{15}=\dfrac{112}{15}\)
\(\Rightarrow\dfrac{x\cdot16}{15}=\dfrac{112}{15}\)
\(\Rightarrow16x=112\)
\(\Rightarrow x=112:16\)
\(\Rightarrow x=7\)
Vậy x=7