(x^(-1) y^(-2))^(-2)=(1/xy²)^(-2)=(xy²)²=x² y^4
(1/2 a^(-3) b³)^(-2)=(b³ /2a³)^(-2)=4a^6/( b^6)
(0.25m^(-2) n²)^(-3)=(n²/4m²)^(-3)=(4m²/n²)³=64m^6 / n^6
(a³b^(-1))²=a^6 /b³
(-3p³q^(-1))²=9p^6/q²
(1/3x^(-3) y²)³=y^6 / 27x^9
Пропорция
5*(x+3)=3*(3x-2)
5x+15=9x-6
5x-9x=-6-15
-4x=-21
x=5.25
решение во вложении.....................................................................................................................................................................................................................................................