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anonymous

  • one year ago

7-9x<12

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  1. mathstudent55
    • one year ago
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    You can solve an inequality the same way you solve an equation with one difference. When you multiply or divide both sides by a negative number, the inequality sign changes direction.

  2. mathstudent55
    • one year ago
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    You want to isolate x. That means you need to get rid of the 7 from the left side first. Step 1. Subtract 7 from both sides. What do you get?

  3. anonymous
    • one year ago
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    -9x<5

  4. mathstudent55
    • one year ago
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    Great. Remember, we're trying to isolate x. Now I see that x is being multiplied by -9. We need x alone, so we need to divide both sides by -9. Remember the rule above that the inequality sign must flip when you multiply or divide by a negative number.

  5. anonymous
    • one year ago
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    Great, thank you!

  6. mathstudent55
    • one year ago
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    |dw:1436149626200:dw|

  7. mathstudent55
    • one year ago
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    |dw:1436149680985:dw|

  8. mathstudent55
    • one year ago
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    You're welcome.

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