Question

Com base na semelhança de triângulo, determine o valor de x.

Answer 1

$\Large\boxed{\begin{array}{l}\sf\dfrac{x}{2x+4}=\dfrac{5}{12}\\\sf 12x=5\cdot(2x+4)\\\sf 12x=10x+20\\\sf 12x-10x=20\\\sf 2x=20\\\sf x=\dfrac{20}{2}\\\sf x=10\end{array}}$