Question

if 3^5 x*81^2*6561/32^x =3^7 then x=?

Answer 1

Answer:

${3}^{5} \times {3}^{4 \times 2} \times {3}^{8} \times {3}^{ - x} = {3}^{7}$

${3}^{(5 + 8 + 8 - x)} = {3}^{7}$

$21 - x = 7$

$x = 21 - 7 = 14$