Tìm x : a) x : (-1/3) ^0 = -1/3

Tìm x
a) x : ${(-\frac{1}{3})}^0 = -\frac{1}{3}$
b)${\left(\frac{4}{5}\right)}^5.x={\left(\frac{4}{5}\right)}^7$
c)${(x+\frac{1}{2})}^2=\frac{1}{16}$​
d)${(3x + 1)}^3=-27$