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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. Getting Started…. Which property can be used to solve the equation: x - 5 = 5. Addition Property
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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
Getting Started… • Which property can be used to solve the equation: x - 5 = 5 Addition Property Of Equality
Section 4.2 Multiplication and Division Equations
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
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
Try this one… -12 ∙ ∙ -12 -144 = y Check it :
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Two More to Try … 21 ∙ t = -336 21t = -336 ∙ -8 -8 ∙ 21 21 x = -32 x = -16 Check: 21 * -16= -336 Check it :