Question

If (2^5)^2=4^x then 3^x is

a 3
b 81
c 243
d 27

Answer 1

Answer:

Given, 3x−y=27 and 3x+y=243

3x−y=33

3x+y=35

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