Question

Sendo r//s//t, determine o valor de x da figura:

Answer 1

Aplicando Teorema de Tales:

$\frac{2x+2}{5x-1} = \frac{4}{7} \\\\7*(2x+2) = 4* (5x-1)\\\\14x+14 = 20x-4\\\\14+4=20x-14x\\\\18=6x\\\\x = \frac{18}{6}\\\\ x = 3$

Resposta: x vale 3.