Hi, how's everyone doing? I need help with these exponential equations, please. Thanks! :)​

Step-by-step explanation:

1).

  Comparing exponents on both the sides.

  x² + 2x = -1

  x² + 2x + 1 = 0

  (x + 1)² = 0

  x = -1

2).

  By comparing exponents,

  x - 3 = 3(x + 1)

  x - 3 = 3x + 3

  3x - x = 3 + 3

  2x = 6

  x = 3

3).

   By comparing exponents,

   5 - k = 2(3 - k)

   5 - k = 6 - 2k

   2k - k = 6 - 5

    k = 1

4).

    By comparing exponents,

    x + 3 = 3(2x + 6)

    x + 3 = 6x + 18

    6x - x = 3 - 18

    5x = - 15

    x = -3

5).

    x - 2 = 0

    x = 2

the answer is the third / last answer

step-by-step explanation: