If we subtract 2x from both sides and 6 from both sides, then we'll have 0 on
the left, and x squared minus 4x minus 5 on the right. Great work if you found
this expression. Now, this might look a little funny to you, but I just
combined the subtraction in one step. I subtracted 2x and I subtracted 6. Keep
in mind that we can do this so long as we perform the same operation on the
left as we do on the right.
