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One-Step Equations with Multiplication

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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One-Step Equations with Multiplication

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  1. One-Step Equationswith Multiplication November 14, 2011

  2. BFF and Enemy Rules • BFF • Same signs  positive • Positive ÷ positive • Negative ÷ negative • Example: -25 ÷ -5 = 5 • Enemy • Different signs  negative • Positive ÷ negative • Negative ÷ positive • Example: -25 ÷ 5 = -5

  3. Solving Multiplication Problems • 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

  4. 15x = 60 -22x = 110

  5. -16x = -96 25x = -150

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