Question

Me ajudem por favor!!!!!

Answer 1

Teorema de tales

a)

$\frac{x}{x + 5} = \frac{3}{10}$
Meios Pelos Extremos

$10x = 3x + 15 \\ 10x - 3x = 15 \\ 7x = 15 \\ x = \frac{15}{7}$
b)
$\frac{x}{16} = \frac{8}{12}$
Meios Pelos Extremos
$12x = 128 \\ x = \frac{128}{12} \ \\ \\ x = \frac{32}{3}$

c)
$x = 12 + 10 + 4 \\ x = 22 + 4 \\ x = 26$