2x^3=3x^a | ./2
x^3=\frac{3}{2}x^a| . /x^a
\frac{x^3}{x^a}=\frac{3}{2}
x^{3-a}=\frac{3}{2}
a=4
x^{-1}=\frac{3}{2}
\frac{1}{x}=\frac{3}{2}
x=\frac{2}{3}
Sprawdzenie
L=2*(\frac{2}{3})^3=2*\frac{8}{27}=\frac{16}{27}
P=3*(\frac{2}{3})^4=3*\frac{16}{81}=\frac{16}{27}
L=P