Explain what the variable represents in an addition or subtraction expression?

or:Explain what the variable represents in an addition or subtraction expression?or:silly question you have asked, please pay attention to add two nu

or:Explain what the variable represents in an addition or subtraction expression?

or:silly question you have asked, please pay attention to add two numbers in calculator or in computer , you need variable to represent the number to be added and stored in the new variable which the answer is stored in it

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