Respuesta :

Answer:

Step-by-step explanation:

The difference in their ages is always:

+2x+-+x+=+x+ yrs ( the difference in 2 yrs )

----------------------

Now, the difference is:

+%28+2x+-+2+%29+-+%28+x+-+2+%29+

+2x+-+2+-+x+%2B+2+=+x+

OK

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