CAIE IGCSE Additional Math 5 Simultaneous Equations Topic Practice

Correct elimination of one unknown e.g.
$$\begin{aligned} \left(\frac{3}{2}\right)^{4} \times \frac{1}{x}=\frac{27}{16} \text { or }\left(\frac{3}{2} x\right)^{4} \times \frac{1}{x^{5}}=\frac{27}{16} \text { or } \frac{y^{4}}{\left(\frac{2 y}{3}\right)^{5}}=\frac{27}{16} \text { or } 16\left(\frac{81}{16} x^{4}\right)=27 x^{5} \text { or } 16 y^{4}=27\left(\frac{32}{243} y^{5}\right) \mathrm{oe} \end{aligned}$$
x=3 and $y=\frac{9}{2}$ oe and no other solutions
A1 for x=3 or $y=\frac{9}{2}$ oe