Answer:
3y-(-12) = 5(x-(-6)
3y+12= 5(x+6)
3y +12 = 5x + 30
3y = 5x +30 - 12
3y = 5x + 18
y = 5x + 6
so 2x+3x+130=180
so 5x+130=180
5x=50
so 2x =20
3x which is angle a is equal to 30 degree