Help me in solving BMCV206 problem

My issue

where use in y

My code

//Update the code below to solve the problem

#include <bits/stdc++.h>
using namespace std;

int main() 
{
 int t;
 cin>>t;
 while(t--)
  { 
   int X,Y;
   cin>>X;
   Y=2*X;
   cout<<y<<endl;
  }
  return 0;
}

Learning course: C++ for problem solving - 1
Problem Link: CodeChef: Practical coding for everyone

@atharvdev1995
U have y to store the answer which will be Y=2*X*5