Question

pls answer step by step​

Answer 1

Answer:

Step-by-step explanation:

a^n ÷ a^m = a^n-m

using that,

(1/5)³ ÷ (1/5)⁷

= (1/5)^3-7

= (1/5)^-4

now a^-n = 1/aⁿ

using it's reverse

1/a^-n = aⁿ

therefore, 1/5^-4 = 5⁴

also, in RHS, 1/5^4-2x

= 5^-(4-2x)

= 5^2x-4

then LHS = RHS

is

5⁴ = 5^2x-4

4 = 2x - 4

2x = 8

x = 4

hope this helps ☺️

Answer 2

Answer:

1/5^3÷1/5^7=1/5^4-2x

=1/5^3-7=1/5^4-2x

=4-2x=3-7

=-2x=3-7-4

=-2x=-8

=x=4