1) 2х = 1/5

х = 1/10

2) 3^х = 3³

х = 3

3) 7^(1 - 3х) = 7^10

1 - 3х = 10

х = -3

4) 2^(2х + 1) = 2^5

2х + 1 = 5

х = 2

5) 4^(2 + х) = 4^0

2 + х = 0

х = -2

6) (1/5)^(4х - 3) = (1/5)^(-1)

4х - 3 = -1

х = 0,5