Formula logₐ^y ᵇ = 1/y logₐ ᵇ
logₐ^4 ˣ - log2^4 ˣ + logₐ ˣ = 3/4
1/4*logₐ ˣ -1/2*logₐ ˣ +logₐ ˣ = 3/4
logₐ x^(1/4) - logₐ x^(1/2) +logₐ x^1 = 3/4
logₐ x^(1/4*-1/2*1) =3/4
logₐ x^(3/4) = 3/4
3/4*logₐ = 3/4
logₐ x = 3/4 : 3/4
logₐ x = 1
x = a
