a)
[tex] \frac{3}{5} = \frac{x}{35} = \frac{30}{y} \\ \\ x = \frac{3 \times 35}{5} = \frac{105}{5} = 21 \\ \\ y = \frac{30 \times 35}{x} = \frac{1050}{21} = 50[/tex]
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b)
[tex] \frac{13}{14} = \frac{65}{x} = \frac{y}{56} \\ \\ x = \frac{14 \times 65}{13} = \frac{910}{13} = 70 \\ \\ y = \frac{65 \times 56}{x} = \frac{3640}{70} = 52[/tex]
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c)
[tex] \frac{85}{x} = \frac{34}{26} = \frac{y}{78} \\ \\ x = \frac{85 \times 26}{34} = \frac{2210}{34} = 65 \\ \\ y = \frac{34 \times 78}{26} = \frac{2652}{26} = 102[/tex]
