auxiliary equation

18 LETTERS · STARTS WITH A

auxiliary equation is a valid 18-letter word worth 36 points in Scrabble and 39 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

A1U1X8I1L1I1A1R1Y4E1Q10U1A1T1I1O1N1

1 + 1 + 8 + 1 + 1 + 1 + 1 + 1 + 4 + 0 + 1 + 10 + 1 + 1 + 1 + 1 + 1 + 1 =36 PTS

DOUBLE WORD → 72TRIPLE WORD → 108

MEANING

What does auxiliary equation mean?