Question

me ajudem pfvv
5x-10+4x-10°=180°

Answer 1

$5x-10\º+4x-10\º=180\º\\\\9x-20\º=180\º\\\\9x=180\º+20\º\\\\9x=200\º\\\\x=\dfrac{200\º}{9}$

Simplificando x:

$x=\dfrac{200\º}{9}=\dfrac{180\º}{9}+\dfrac{18\º}{9}+\dfrac{2\º}{9}\\\\\\x=20\º+2\º+\left(\dfrac{2}{9}\right)^{0}\\\\\\x=22\º+\dfrac{2}{9}\cdot60'\\\\\\x=22\º+\dfrac{2\cdot20'}{3}=22\º+\dfrac{39'}{3}+\dfrac{1'}{3}\\\\\\x=22\º+13'+\dfrac{60''}{3}\\\\\\\boxed{\boxed{x=22\º~13'~20''}}$