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