Ch. 1.3 Solving Linear Equations

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Presentation transcript:

Ch. 1.3 Solving Linear Equations

What is an equation?

Properties of Equality Addition property of equality - can add the same term to both sides of an equation. Subtraction property of equality - can subtract the same term from both sides of an equation. Multiplication property of equality - can multiply both sides of an equation by the same term. Division property of equality - can divide both sides of an equation by the same term. ** So basically, whatever you do to one side of an equation, you MUST do to the other!

To solve an equation for a variable: Do order of operations backwards (undo +/- first, then multiply/divide) Keep going until the variable is by itself on one side of the equation You may have to simplify each side first.

4 5 x + 8 = 20 Write original equation.