Question

sistema exponencial, help...

Answer 1

x+y=6⁷/3^(x)

(x+y)^(1/n)=2

[6⁷/3^(x)]^(1/n)=2

6⁷/3^(x) =2^(n)  .......

6⁷=(2*3)⁷ =2⁷ *3⁷

2⁷ *3⁷/3^(x)=2^(n)   ==>n=7   e x=7

.....
x+y=6⁷/3^(x)
7+y=6⁷/3⁷  ==>7+y=128  ==>y=121

y-x=121-7=114


Letra C