Explicación paso a paso:
a.
[tex] \frac{5}{6} = \frac{x}{12} [/tex]
[tex]60 = 6x[/tex]
[tex]6x = 60[/tex]
[tex]x = 10[/tex]
b.
[tex] \frac{x}{2} = \frac{18}{4} [/tex]
[tex] \frac{x}{2} = \frac{9}{2} [/tex]
[tex]x = 9[/tex]
c.
[tex] \frac{7}{49} = \frac{7}{x} [/tex]
[tex] 7 = \frac{7}{x} [/tex]
[tex]7x = 7[/tex]
[tex]x = 1[/tex]
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Explicación paso a paso:
a.
[tex] \frac{5}{6} = \frac{x}{12} [/tex]
[tex]60 = 6x[/tex]
[tex]6x = 60[/tex]
[tex]x = 10[/tex]
b.
[tex] \frac{x}{2} = \frac{18}{4} [/tex]
[tex] \frac{x}{2} = \frac{9}{2} [/tex]
[tex]x = 9[/tex]
c.
[tex] \frac{7}{49} = \frac{7}{x} [/tex]
[tex] 7 = \frac{7}{x} [/tex]
[tex]7x = 7[/tex]
[tex]x = 1[/tex]