Question

Nas figuras, a//b//c, calcule o valor de X.
Contas por favor

Answer 1

Aplicando o teorema de Tales:

$\frac{x}{4}=\frac{9}{18}\\\\\frac{x}{4}=\frac{1}{2}\\\\x\;.\;2=4\;.\;1\\\\2x=4\\\\x=\frac{4}{2}\\\\x=2$