First you must simplify the expression by adding like variables with numbers attached
2x + x - 5y + 3 = 3x - 5y + 3
3x - 5y + 3
3x is a term
-5y is a term
3 is a term
Therefore, there is 3 terms
A is your answer
hope this helps
(a term is a number, letter, number and letter, with a sign attached to it)
for example
10
-10
-10x
-10xy
-10xy^5