We would like to have one *x* all by itself on one side of the equation. If we add *x *to either side of the equation, we find that - 2 = - *x* + 1 Since we would like to get a positive *x* on one side of the equation—we made a New Year's resolution to be more upbeat—we add another *x* to either side: - 2 + *x* = 1 All that is left is to add 2 to each side and write *x* = 3
We could also have added 2*x* to each side from the start: |