Now, we have z = 4 and y = 2 ... Stick them both into the top equation and we'll get x!
So, x = -1, y = 2 and z = 4. Since this is a point in space, we write the answer as a 3-D coordinate:
(-1, 2, 4)
Yeah, that was just the END of one of these problems! Really, it just looks like a lot because of all my explaining.
Just work your way back up: