Question

Determine o valor de x na figura abaixo, sabendo que as retas r e s são paralelas:

Answer 1

$\large\boxed{\begin{array}{l}\sf 3x+20^\circ+2x-30^\circ=180^\circ\\\sf 5x-10^\circ=180^\circ\\\sf 5x=180^\circ+10^\circ\\\sf 5x=190^\circ\\\sf x=\dfrac{190^\circ}{5}\\\\\sf x=38^\circ\end{array}}$