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## 3.1 Two-Step Equations

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**An equation is like a seesaw.**What does that mean?**In order to isolate the variable, you must undo whatever is**being done.**In order to isolate the variable, you must undo whatever is**being done. • Since you are undoing things, they must be done backwards.**DOING**UNDOING P E MD AS AS MD E P Remember UNDOINGmeans solving equations**Doing things backwards means reverse the order of**operations. 1. Undo any addition or subtraction. 2. Undo any multiplication or division. 3. Undo any exponents.