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# One-Step Equations with Multiplication - PowerPoint PPT Presentation

One-Step Equations with Multiplication. November 14, 2011. BFF and Enemy Rules. BFF Same signs  positive Positive ÷ positive Negative ÷ negative Example: -25 ÷ -5 = 5 Enemy Different signs  negative Positive ÷ negative Negative ÷ positive

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## PowerPoint Slideshow about ' One-Step Equations with Multiplication' - cameron-nicholson

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### One-Step Equationswith Multiplication

November 14, 2011

• BFF

• Same signs  positive

• Positive ÷ positive

• Negative ÷ negative

• Example: -25 ÷ -5 = 5

• Enemy

• Different signs  negative

• Positive ÷ negative

• Negative ÷ positive

• Example: -25 ÷ 5 = -5

• Get x by itself

• Use the inverse operation

• Check with substitution

Example:

-15x = 30 x is not alone

-15x = 30 use division to

-15 -15 to solve

x = -2

-15(-2) = 30 Substitution