Respuesta :

Answer:

its 4

Step-by-step explanation:

Given, 3  

x−y

=27 and 3  

x+y

=243

3  

x−y

=3  

3

 

3  

x+y

=3  

5

 

As bases are equal powers must be equal

x−y=3 and x+y=5

Adding them,

x−y+x+y=8

2x=8

x=4

Thus, 4−y=3

y=1

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