Question 31073
LET X BE THE SIDE OF THE SQUARE WINDOW THEREFORE THE SHUTTER SIZE IS X(X-18) AND IS 594 SQ FEET LESS THAN THE WINDOW THUS

WINDOW MEASUREMENT IS (X~2) AND ONE SHUDDER IS X(X-18) AND IS 594 SQ INCHES LESS THAN THE WINDOE THEREFORE X~2=X(X-18)+594 OR X~2=X~2-18X+594 OR
CANCELLING OUT THE X~2 WE HAVE 18X=494 OR X=33 
PROOF THE WINDOW IS 33*33=1089 AND THE SHUDDER IS 33(33-18)OR 33*15=495
OR WINDOW MINUS SHUDDER IS 1089-495=594