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Solve the following pair of linear equations by cross-multiplication method.
(i) \( 4 x+6 y=5,2 x+9 y=3 \)
(ii) \( 5 x+4 y-4=0, x-12 y-20=0 \)
(iii) \( 3 x-5 y+1=0,2 x+3 y-12=0 \)
(iv) \( \frac{x}{7}+\frac{y}{3}=5, \frac{x}{2}-\frac{y}{9}=6 \)
(v) \( \frac{x}{6}+\frac{y}{15}=4, \frac{x}{3}-\frac{y}{12}=\frac{-19}{4} \)
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