Question

Tìm abc biết:

   abc2-2abc=306

             Giúp mình với!

Answer 1

\(\overline{abc2}-\overline{2abc}=306\)

\(\Rightarrow\overline{abc}\times10+2-2000-\overline{abc}=306\)

\(\Rightarrow\overline{abc}\times9+2=2306\)

\(\Rightarrow\overline{abc}\times9=2304\)

\(\Rightarrow\overline{abc}=256\)