You can put this solution on YOUR website! Ahh. Much better :)
z = 14 -y.
To solve for y, we need to isolate y on one side and the rest of the variables/constants on the other.
To do this, let's first add y to both sides.
z +y = 14 -y + y
z+y = 14
To finish this off, let's subtract z on both sides.