1 REM THIS PROGRAM APPEARS AT PAGE 170 OF THE ITALIAN VERSION OF
2 REM "PROGRAMMING IN BASIC" 1ST EDITION, BY BYRON S. GOTTFRIED 
10 DIM A(3,3),B(3,3),C(3,3)
20 MAT READ A
30 MAT B=INV(A)
40 MAT C=A*B
50 MAT PRINT A,B,C
60 PRINT "DETERMINANT=";DET
70 DATA 5,3,1,3,7,4,1,4,9
80 END
