... i,j,k,n,t;float s,c;char tl;clrscr();printf("Cho so phuong trinh n = ");85scanf("%d",&n);printf("Cho cac phan tu cua ma tran a\n");for (i=1;i<=n;i++) for (j=1;j<=n;j++){ ... i,j,k,n,t;float s,c;char tl;clrscr();printf("Cho so phuong trinh n = ");scanf("%d",&n);printf("Cho cac phan tu cua ma tran a :\n");for (i=1;i<=n;i++) for (j=1;j<=n;j++){ ... i,j,k,n,t;float c,s,d;char tl;clrscr();printf("Cho so phuong trinh n = ");scanf("%d",&n);printf("Cho cac phan tu cua ma tran a :\n");for (i=1;i<=n;i++) for (j=1;j<=n;j++){93...