Respuesta :

remember if straight line total is 180 degree
Ver imagen syahidah
X is 30
X is 30 because you add the two equations to equal 360 (the degree of the line)The -10 and 10 cancel each other out. 6x+6x and that equals 12x and 360 divided by 12 is 30
You can check this by plugging the number into the equations