Question

AJUDDDDDA POR FAVOR!

Answer 1

a)2^6x = 2^8
6x = 8
x=8/6
x= 4/3

b) 5^2(x+2) = 5^3(x+5)
2x+4 = 3x + 15
2x-3x=15-4
-x = 11
x= -11

c) 2^x-15 = 2^4
x-15 = 4
x=4+15
x=19

d) 3^-3 = 3^x+2
-3 = x+2
-3-2=x
x= -5

2) 400 = 25.2^t
400/25 = 2^t
16 = 2^t
2^4 = 2^t
t=4 anos