#include<iostream>
using namespace std;
void main()
{
    double a[3][4]={{0,0,0,0},{0,3,-2,12},{0,2,1,1}};
    int p,i,j,n=2;
    //for(p=1;p<n;p++)
        //for(i=p;i<n;i++)
                //for(j=p;j<=n+1;j++)
                    //a[i+1][j]=a[i+1][j]-a[i+1][1]*a[p][j]/a[p][1];
    for(i=1;i<=n;i++)
    {a[i][n+1]=a[i][n+1]/a[i][i];
    cout<<a[i][n+1];
    }
}