Answer:

constant: none (sa tingin ko po)

variables: "2x" , "5y" or "x" , "y"

operations: addition

Step-by-step explanation:

constants - a quantity or parameter that does not change its value whatever the value of the variables, under a given set of conditions.

variables - a quantity which during a calculation is assumed to vary or be capable of varying in value.

operations - The mathematical “operation” refers to calculating a value using operands and a math operator.

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