Lgx=1/2 lg 5 a-3 lg b+4lgc

Lgx = (1/2) * lg5a-3*lg5a-3*lg+4*lgc

lgx=-2,5*lg5a-lgb³+lgc⁴

lgx=lg ((5a) ⁻²,⁵ / b³ * c⁴)

x=c⁴ / (b³ * a² * √a)

2. log₂x=-1, x=2⁻¹. x=1/2. x=0,5

3. log₁/₆x=-3, x = (1/6) ⁻³. x=6³. x=216

4. log_ (x) (1/16) = 2, x>0

x²=1/16, x=√ (1/16)

x=1/4, x=0,25