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
identity.** |