Answer :
1. the two lines are coincident. as the second equation is obtained by multiplying first equation by 2.
2. the two given lines are coincident.
3. infinitely many , as every point on the line is a solution of the system of equations.
4. missing are : 3 * 4 and 5 * 4
2. the two given lines are coincident.
3. infinitely many , as every point on the line is a solution of the system of equations.
4. missing are : 3 * 4 and 5 * 4