Question

Plz answer it soon ...... i need it urgently

Answer 1

( 7/12)^-4 × ( 7/12)^3x = (7/12)^5

we know
if a^m × a^n then , we can write this
a^(m + n) .

e.g a^m × a^n = a^(m + n)

now use this ,

( 7/12)^-4 × (7/12)^3x = (7/12)^5

(7/12)^( -4 + 3x ) = (7/12)^5

(-4 + 3x ) = 5

3x = 5+ 4= 9

x = 3

Answer 2

(7/12)^-4*(7/12)^3x = (7/12)^5

(7/12)^-4+3x = (7/12)^5

equating powers 
-4 +3x = 5
x=3