You can put this solution on YOUR website! In this question: we can substitute y from the first equation into the second equation (a special type of substitution called the y=y method).
This gives us:
Now we need to isolate x and solve:
Now we have our x value, we need to substitute this into either of the original equations and solve for y (I will put it inot the y=x-3 equation though either choice will give you the same answer)