\(\Rightarrow\overline{abc}x1001=\overline{1b5a2c}\)
\(\Rightarrow\overline{abc}x\left(1000+1\right)=\overline{1b5a2c}\)
\(\Rightarrow\overline{abc000}+\overline{abc}=\overline{1b5a2c}\)
\(\Rightarrow\overline{abcabc}=\overline{1b5a2c}\)
\(\Rightarrow a=1;b=2;c=5\)