Question

determine a medida x em cada figura r//s//t

Answer 1

a)
$\frac{9}{12} = \frac{x}{8}$
12x=72
x=$\frac{72}{12}$
x=6



b)
 $\frac{12-x}{x}$=$\frac{2}{6}$
72-6x=20
6x=72-20
6x=52
x=$\frac{52}{6}$
x=$\frac{26}{3}$

c)
$\frac{x+1}{x+2} = \frac{8}{10}$
$\frac{x+1}{x+2} = \frac{4}{5}$
5x+5=4x+8
5x-4x=8-4
x=4