Algebra 1 · Expressions & Equations
Isolate the Variable
Algebra 1 · Expressions & Equations
Definition
To isolate the variable is to get the variable alone on one side of an equation using inverse operations.
Teach it
Where it is taught, with guided notes, practice, homework, an exit ticket and an interactive Teacher Deck.
Examples
- x + 7 = 12 → subtract 7 → x = 5.
- 4x = 20 → divide by 4 → x = 5.
Key rule
Undo operations in reverse order until the variable stands alone.
Memory hook
Get the variable alone on its own island.