1.

\begin{array}{l}{\text { (ii) } 3 x+4 y=10 \text { 3it } 2 x-2 y=2} \\ {\text { (iv) } \frac{x}{2}+\frac{2 y}{3}=-13 \pi x-\frac{y}{3}=3}\end{array}

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