Write Yes if each equation below is a linear equation in two variables, otherwise, No.
[tex]1.2x - 10y = 7[/tex]
[tex]2.3xy + y = 4[/tex]
[tex]3.x - \frac{1}{9} y = - 9[/tex]
[tex]4.y - 2x - 15 = 0[/tex]
[tex] 5.\frac{1}{x} + 8 \sqrt{y} = 10[/tex]
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