Question

Answer 1

a) ( 9 - x )³ = 216

6³ = 216

=> x = 3

b) 7^x-8 + 20 = 69

7^x-8 = 69 - 20

7^x-8 = 49

7² = 49

=> x = 10

c) 5³ . 5^x+2 = 5⁷

5^x+2 = 5⁷ : 5³

5^x+2 = 5⁴

=> x = 2

d) ( 2x - 1)⁴ - 5² = 600

(2x - 1)⁴ - 25 = 600

(2x - 1)⁴ = 600 + 25 = 625

5⁴ = 625

=> x = 3

 

Answer 2

e) 2^x - 2³ = 24

2^x - 8 = 24

2^x = 24 + 8 = 32

x = 5