Question

calcule x no triângulo abaixo :​

Answer 1

$\textsf{Leia abaixo}$

Explicação passo-a-passo:

$\large\boxed{\begin{array}{l} \rm \: 5x + 4x + 45\textdegree = 180\textdegree \\ \\ \rm \: 9x = 180\textdegree - 45\textdegree \\ \\ \rm \: 9x = 135\textdegree \\ \\ \rm \: x = \dfrac{135\textdegree}{9} \\ \\ \boxed{ \rm{x = 15\textdegree}} \end{array}}$