s="r-in"><span><span class="fu"><a href="Inverse.html">inv</a></span><span class="op">(</span><span class="cn">T</span><span class="op">)</span> <span class="op"><a href="https://rdrr.io/r/base/matmult.html" class="external-link">%*%</a></span> <span class="va">Abt</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span>                 b</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> [1,]  2  1 -1   8</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> [2,] -3 -1