To solve tricky inequalities easily, students can use some helpful strategies:
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Know the Inequality Symbols:
- Get to know the symbols:
- > means "greater than,"
- < means "less than,"
- ≥ means "greater than or equal to," and
- ≤ means "less than or equal to."
- Understanding these symbols is important for finding the right answers.
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Isolate the Variable:
- Start by getting the variable by itself on one side, just like you do with equations.
- For example, to solve 3x−5<7, first add 5 to both sides:
- This gives you 3x<12.
- Then, divide both sides by 3 to find x<4.
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Reverse the Inequality:
- When you multiply or divide both sides by a negative number, you need to flip the inequality sign.
- For example, if you have −2x>6, when you divide both sides by -2, it changes to x<−3.
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Graphing Solutions:
- Drawing your solutions on a number line can really help.
- Use an open circle for numbers that are not included (like x<4) and a closed circle for numbers that are included (like x≤4).
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Check Your Solutions:
- Always put your answer back into the original inequality to see if it works.
- This step helps make sure your answer is correct and helps you understand better.
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Practice with Different Problems:
- Try solving various types of inequalities regularly.
- Studies show that practicing consistently can improve how well you remember and solve problems by up to 30%.
By using these strategies, students can feel more confident and get better at solving complex inequalities.