Question

determine os valores de X e Y nas figuras a seguir: ​

Answer 1

$15x-45^{\circ} =12x-15^{\circ}\\15x-12x=45^{\circ}-15^{\circ}$

$3x=30^{\circ}\\x=\dfrac{30^{\circ}}{3}\\x=10^{\circ}$

$12.10^{\circ} -15^{\circ} =105^{\circ}$

$y=180^{\circ}-105^{\circ} \\y=75^{\circ}$