Given that the values of 4x-3 and 5x + 12 are opposite to each other, what is x equal to If it's OK, add 50 points. I'm poor and I don't have many points

Given that the values of 4x-3 and 5x + 12 are opposite to each other, what is x equal to If it's OK, add 50 points. I'm poor and I don't have many points

4x-3=-(5x+12)
4x-3=-5x-2
9x=1
x=1/9