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Noteables Interactive Study Notebook (26491.0K) - McGraw-Hill ...

Noteables Interactive Study Notebook (26491.0K) - McGraw-Hill ...

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12–3EXAMPLE Solve an Equation by Using Zero PairsKEY CONCEPTSubtraction Property ofEquality If you subtractthe same number fromeach side of an equation,the two sides remainequal.Solve x + 11 = 7. Check your solution.METHOD 1 Use models. Model the equation.x + 11 = 7 Add 4 zero pairs to theright side of the mat sothere are 11 positivecounters on the right.x + 11 = 7 Remove 11 positivecounters from each side.x + 11 - = 7 -x =METHOD 2 Use symbols.x + 11 = 7x + 11 = 7Write the equation.Subtract 11 from eachside to undo x plus 11.- = - Subtract 11 from each side._______x = 7 - =The solution is . Check -4 + 11 = 7 ✔Check Your Progressif nececssary.Solve each equation. Use modelsa. m + 9 = 3 b. x + 7 = 13Copyright © Glencoe/<strong>McGraw</strong>-<strong>Hill</strong>, a division of The <strong>McGraw</strong>-<strong>Hill</strong> Companies, Inc.298 Math Connects, Course 1

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