Question

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Answer 1

Respuesta:

1)                              

$2^{x}$ = 8

$2^{x}$ = $2^{3}$

x = 3

2)

$3^{x+2}$ = 27

$3^{x+2}$ = $3^3}$

x+2 = 3

x = 1

3)

$9^{x-1}$ = 3

$3^{2(x-1)}$ = 3

2x-2 = 3

x = 5/2

4)

$2^{x+2}$ - $2^{x}$ = 12

$2^{x+2}$  - $2^{x}$ = $2^{4}$ - $2^{2}$

x = 2

Explicación paso a paso: