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PLEASE HELP I WILL GIFT 100 POINTS ASAP Which represents The variable in the following number sentence.
3+r=45

Respuesta :

MarshMelody101

Answer:

I think that would be R

Step-by-step explanation:

A Variable is a symbol for a number we don't know yet. It is usually a letter like x or y. A number on its own is called a Constant.

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