[tex]Solving \ an \ equation \ means \ finding \ a \ value \ of \ a \ variable[/tex][tex] that \ make \ the \ equation \ true. [/tex]
[tex]Each \ sides \ of \ the \ equation \ should \ be \ equal \ at \ all \ times.
[/tex][tex]Whatever \ we \ do \ to \ one \ side, has \ to \ be \ done \ on \ the \ opposite \ side.[/tex]
