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terminallychill

  • 3 years ago

-1 ≤ a − 3 ≤ 2 solve compound inequality, help.

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  1. tcarroll010
    • 3 years ago
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    With inequalities, you can add or subtract numbers to all sides and retain the direction of the sign. So, find a number such that if you add it to "a - 3" you end up with "a". Take that number and add it to all 3 expressions.

  2. terminallychill
    • 3 years ago
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    I'm still really confused...

  3. tcarroll010
    • 3 years ago
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    You are looking for (a - 3) + x = a That is the same as: a + (x - 3) = a So, you are looking for where x - 3 = 0. What is "x"? You add whatever "x" is to all 3 expression and you get "a" all by itself.

  4. terminallychill
    • 3 years ago
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    So, I Add 3?

  5. tcarroll010
    • 3 years ago
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    Yes, to the left, center, and right-side expressions.

  6. tcarroll010
    • 3 years ago
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    So, for the left-side, you get 3 - 1 because that is adding 3 to the left.

  7. tcarroll010
    • 3 years ago
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    When you add 3 to the center expression, you get (a - 3) + 3 = a + (3 - 3) = a + 0 = a, which is what you want. The right-side expression, before simplifying, is 2 + 3.

  8. terminallychill
    • 3 years ago
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    I'm lost again...ha :c

  9. tcarroll010
    • 3 years ago
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    For the left, you have 3 - 1. What is that?

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