Respuesta :

apologiabiology
all angles inside add to 540
148+90+2x+10+112+2x=540
360+4x=540
minus 360 both sides
4x=180
divide both sides by 4
x=45 detrees
2x+10+2x+90+112+148=540
4x+360=540
4x=540-360
4x=180
x= 45

answer x = 45