Final answer:
To correct Praveen's system, the sign in the second inequality should be changed to >.
Step-by-step explanation:
To correct Praveen's system, we need to change the sign in the second inequality to >, which would make it 3y>-4x-1. The first inequality, y>2x, is already correct. So the correct system would be y>2x and 3y>-4x-1.