Where did our variable, x, go???
It disappeared on us. Also note how we ended up with a TRUE statement,
-27 does indeed equal -27. This does not mean that x = -27.
Whenever your variable drops out AND you end
up with a TRUE statement, then the solution is ALL REAL NUMBERS. This
means that if you plug in any real number for x in this equation, the left side will equal the right side.
So the answer is all real numbers, which means this equation is an