If 9 7 3 49 81 2x 6 7 9 9 then the value of x is ........

Quantitative Aptitiude (CLAT) Simplification

If (9/7)³ * (49/81)^2x-6 =(7/9)⁹, then the value of x is:

(9/7)³* (49/81)^2x-6
= (7/9)⁹(7/9)^-3 * (7/9)^{4x –12}
= (7/9)⁹ i.e.(7/9)^{4x –15}
= (7/9)⁹
Comparing: 4x -15 = 9 or, x = 6

Submit Error