linear.bas (420B)
11 REM ::: SOLVE A SYSTEM OF LINEAR EQUATIONS 22 REM ::: A1*X1 + A2*X2 = B1 33 REM ::: A3*X1 + A4*X2 = B2 44 REM -------------------------------------- 510 READ A1, A2, A3, A4 615 LET D = A1 * A4 - A3 * A2 720 IF D = 0 THEN 65 830 READ B1, B2 937 LET X1 = (B1*A4 - B2*A2) / D 1042 LET X2 = (A1*B2 - A3*B1) / D 1155 PRINT X1, X2 1260 GOTO 30 1365 PRINT "NO UNIQUE SOLUTION" 1470 DATA 1, 2, 4 1580 DATA 2, -7, 5 1685 DATA 1, 3, 4, -7 1790 END