okay so for the first question, if you simplify the equation, you get 5 = 6, which is never true. Therefore it has 0 solutions.
For the second question, if you simplify the equation you get 21 = 21, which is always true. Therefore it has infinite solutions.
Now let’s write the equation for the last question: 3p + 5 = 11, simplifying would give you 3p = 6, which means p = 2