Question

1. Determine o valor
de x sabendo que:
DE // BC.
​

Answer 1

(3 + x)/x = (x + 1 + 4)/(x + 1)

(3 + x)/x = (x + 5)/(x + 1)

(x + 1)(3 + x) = x(x + 5)

3x + x² + 3 + x = x² + 5x

4x + 3 = 5x

5x - 4x = 3

x = 3

Resposta: x = 3