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Solving Equations Using Properties of Equality

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Learn how to solve equations using Addition, Multiplication, and Division Properties of Equality. Explore interactive examples and practice problems to enhance your understanding.

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Solving Equations Using Properties of Equality

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  1. Getting Started… -63 = d + 88 u+ (-18) = -27 - 88 - 88 +18 +18 u= -9 -151= d Check it ! -9 + (-18) = -27 -27 = -27 Check -151 + 88 = -63 -63 = -63

  2. Getting Started… • Which property can be used to solve the equation: x - 5 = 5 Addition Property Of Equality

  3. Section 4.2 Multiplication and Division Equations

  4. Definitions • Multiplication Property of Equality: • Division Property of Equality: For any numbers A, B, and C, if A=B, then A•C=B•C For any numbers A, B, and C, if A=B, then A÷C=B÷C

  5. You want to give out lollipops to your friends at the lunch table. There are 8 kids at your table and you want to give out ALL 24 of your lollipops. How many lollipops will you give each friend? 3! 8 ∙ x = 24 8x = 24 8 8 Check: 8 * 3 = 24 x = 3

  6. Try this one… -12 ∙ ∙ -12 -144 = y Check it :

  7. Here we Go! • http://player.discoveryeducation.com/index.cfm?guidAssetId=254DB56E-59CB-44D2-977E-605BECA9F095&blnFromSearch=1&productcode=US

  8. Two More to Try … 21 ∙ t = -336 21t = -336 ∙ -8 -8 ∙ 21 21 x = -32 x = -16 Check: 21 * -16= -336 Check it :

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