Solving Equations. To solve an equation, you must isolate the variable (get the letter by itself). You do this by using opposite operations to undo what’s.

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Presentation transcript:

Solving Equations

To solve an equation, you must isolate the variable (get the letter by itself). You do this by using opposite operations to undo what’s been done (add/subtract, multiply/divide). Whatever you do to one side of the equation, you must do to the other, to maintain balance. Think of an equation as a balanced scale with the equal sign in the middle.

X + 4 = 7 X + 4 – 4 = 7 – 4 X = 3 X + 4 = X = 3 X = X + 47

X - 4 = 7 X – = X = 11 X - 4 = X = X = X - 4 7

4X = 8 4X ÷ 4 = 8 ÷ 4 X = 2 4X = X = 2 om/Flashcards/algebra.h tml nteractivate/activities/ X = X X X 4X 8