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**3-2 Solving Inequalities Using Addition or Subtraction**

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**Addition Property of Inequality**

Words: Let a, b, and c be real numbers If a > b, then a + c > b + c If a < b, then a + c < b + c Examples: 5 > 4, so > –2 < 0, so –2 + 1 < 0 + 1

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**Problem 1/2: Solving an Inequality, Graphing, and Checking Solutions**

𝑥−15>−12

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𝑛−5<−3

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**Subtraction Property of Inequality**

Words: Let a, b, and c be real numbers If a > b, then a – c > b – c If a < b, then a – c < b – c Examples: 5 > 4, so 5 – 3 > 4 – 3 –2 < 0, so –2 – 1 < 0 – 1

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**Problem 3: Using the Subtraction Property of Inequality**

𝑡+6≤−4

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−1≥𝑦+12

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**Problem 4: Writing and Solving an Inequality**

The hard drive on your computer has a capacity of 120 GB. You have used 85 GB. You want to save some home videos to your hard drive. What are the possible sizes of the home video collection you can save?

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