Respuesta:
1)
[tex]\frac{x+1}{x-1} = \frac{3}{4}[/tex]
[tex]x+1= \frac{3}{4}(x-1)[/tex]
[tex]x+1= \frac{3}{4}x - \frac{3}{4}[/tex]
[tex]x - \frac{3}{4} x = -\frac{3}{4}-1[/tex]
[tex]\frac{1}{4}x = -\frac{7}{4}[/tex]
[tex]x = -\frac{7}{4}*4\\[/tex]
[tex]x = -7[/tex]
2)
[tex]\frac{x-9}{27} = \frac{1}{3}[/tex]
[tex]x-9 = \frac{1}{3}(27)[/tex]
[tex]x - 9 = 9[/tex]
[tex]x = 9 + 9[/tex]
[tex]x = 18[/tex]
3)
[tex]\frac{x+7}{50} = \frac{1}{5}[/tex]
[tex]x + 7 = \frac{1}{5}(50)[/tex]
[tex]x + 7 = 10[/tex]
[tex]x = 10 - 7[/tex]
[tex]x = 3[/tex]
Explicación paso a paso:
