diff --git a/unpacked/jax/input/TeX/jax.js b/unpacked/jax/input/TeX/jax.js
index c81afc555..65e1088a2 100644
--- a/unpacked/jax/input/TeX/jax.js
+++ b/unpacked/jax/input/TeX/jax.js
@@ -296,7 +296,14 @@
       }
       this.row.push(mtd); this.data = []; this.hfill = [];
     },
-    EndRow:   function () {this.table.push(MML.mtr.apply(MML,this.row)); this.row = []},
+    EndRow:   function () {
+      var mtr = MML.mtr;
+      if (this.isNumbered && this.row.length === 3) {
+        this.row.unshift(this.row.pop());  // move equation number to first position
+        mtr = MML.mlabeledtr;
+      }
+      this.table.push(mtr.apply(MML,this.row)); this.row = [];
+    },
     EndTable: function () {
       if (this.data.length || this.row.length) {this.EndEntry(); this.EndRow()}
       this.checkLines();
@@ -922,8 +929,8 @@
         hline:             ['HLine','solid'],
         hdashline:         ['HLine','dashed'],
 //      noalign:            'HandleNoAlign',
-        eqalignno:         ['Matrix',null,null,"right left right",MML.LENGTH.THICKMATHSPACE+" 3em",".5em",'D'],
-        leqalignno:        ['Matrix',null,null,"right left right",MML.LENGTH.THICKMATHSPACE+" 3em",".5em",'D'],
+        eqalignno:         ['Matrix',null,null,"right left",MML.LENGTH.THICKMATHSPACE,".5em",'D',null,"right"],
+        leqalignno:        ['Matrix',null,null,"right left",MML.LENGTH.THICKMATHSPACE,".5em",'D',null,"left"],
         hfill:              'HFill',
         hfil:               'HFill',   // \hfil treated as \hfill for now
         hfilll:             'HFill',   // \hfilll treated as \hfill for now
@@ -1630,7 +1637,7 @@
       }
     },
     
-    Matrix: function (name,open,close,align,spacing,vspacing,style,cases) {
+    Matrix: function (name,open,close,align,spacing,vspacing,style,cases,numbered) {
       var c = this.GetNext();
       if (c === "")
         {TEX.Error(["MissingArgFor","Missing argument for %1",name])}
@@ -1643,6 +1650,7 @@
         }
       });
       if (cases)         {array.isCases = true}
+      if (numbered)      {array.isNumbered = true; array.arraydef.side = numbered}
       if (open || close) {array.open = open; array.close = close}
       if (style === "D") {array.arraydef.displaystyle = true}
       if (align != null) {array.arraydef.columnalign = align}