Respuesta :

Answer:

the last one

Step-by-step explanation:

Answer:

the answer is indeed the last one

Step-by-step explanation:

7x-3x is the only one that meets the requirements for this statement

7-3x would be the difference between seven and three times a number

7x-3 would be the difference between seven times a number and three

have an absolutely fantastic day my friend!

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