Ответ:
- \(\frac{12ab}{18bc}=\frac{2a}{3c}\), \(b\ne0,\ c\ne0\).
- \(\frac{8x^2y}{12xy^2}=\frac{2x}{3y}\), \(x\ne0,\ y\ne0\).
- \(\frac{3m^4}{-9m^2n}=-\frac{m^2}{3n}\), \(m\ne0,\ n\ne0\).
- \(\frac{-8p^3q^2}{-4pq^3}=\frac{2p^2}{q}\), \(p\ne0,\ q\ne0\).
- \(\frac{15a^3b}{45a^2b^2}=\frac{a}{3b}\), \(a\ne0,\ b\ne0\).
- \(\frac{48x^3y^2}{32x^2y^4}=\frac{3x}{2y^2}\), \(x\ne0,\ y\ne0\).
