How do checks and balances work?

I cannot give you a detailed answer but a brief description is that each branch of government can check each other. The executive branch can check congress and congress can check the judicial and the judicial can check the executive, correct me if I am wrong

Some examples of checks and balances are:

LEGISLATIVE TO EXECUTIVE~ must approve all cabinet members, ambassadors, etc.

LEGISLATIVE TO JUDICIAL~ must approve all justices

The senate also has the power to impeach the president and justices of the supreme court

JUDICIAL TO EXECUTIVE~ declare acts unconstitutional

JUDICIAL TO LEGISLATIVE~ can declare laws unconstitutional

Justices are also appointed for life, but usually good behaviour as well

EXECUTIVE TO LEGISLATIVE~ can veto bills and can also propose laws

EXECUTIVE TO JUDICIAL~ can appoint justices and other judges

The president is also head of the military.

but yes checks and balances are basically that each branch of government can override the other so that one is not sole power.