[tex]\it \overline{ab2}+\overline{a5c}+\overline{6bc}=1348 \Rightarrow 100a+10b+2+100a+50+c+600+10b+c=1348\Rightarrow\\ \\ \Rightarrow 200a+20b+2c+652=1348\Big|_{:2} \Rightarrow 100a+10b+c+326=674\Rightarrow\\ \\ \Rightarrow \overline{abc}+326=674\Big|_{-326} \Rightarrow \overline{abc}=348[/tex]
