Infinitely many
As you can see in my work, there is no x = something, but there is also nothing that says a number is unequal to another number (x != 3 or 5 =/= 3). This lack of a definite correct or incorrect answer means that there are infinite solutions. If you look on the 3rd line of my work, they are the exact same equation, meaning that no matter what number you use for “x” you’ll always end up with the correct answerr