Respuesta :
A right angle (90°) is divided into two parts, and one of the angles is 30°.
So the other angle must be 90-30=60°, and 60°=5x+15 so
5x+15=60
5x=45
x=9
So x=9°
So the other angle must be 90-30=60°, and 60°=5x+15 so
5x+15=60
5x=45
x=9
So x=9°