Compute . Give your answer as a base integer.

   14A6₁₂

     -  5B9₁₂

     ----------

       AA9₁₂ or just AA9 without the subscript

Thanks Chris

$$\begin{array}{rlllll}
&3&^19&&\\
1&\not{4}&\not{A}&^16&_{12}\quad&\mbox{Take 12 from the 2nd column 12+6-9=9 etc}\\
&5&B&9&_{12}\quad&\mbox{12+9-11=10=A}\\
&&&&\quad&\mbox{12+3-5=10=A}\\\\\hline
&A&A&9&_{12}\\
\end{array}$$

Do you understand Mellie ?     I have done this like an ordinary subtraction