Question

Determine o valor de x:

Answer 1

Pelo Teorema de Tales:

a)

x/4 = 9/18

x/4 = 1/2

x = 4/2

x = 2

b)

8/(x + 1) = 12/(2x - 6)

8(x - 3) = 6(x + 1)

4x - 12 = 3x + 3

4x - 3x = 12 + 3

x = 15

Resposta:

a) x = 2

b) x = 15