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What are Absolute Value Equations​

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  • OneOfAKindSunflower

    Absolute Value Equations are equations that look like this:

    I x + 5 I = 15

    They have 2 solutions almost all the time. To solve this equation we do this:

    x+5=15      x+5=-15

    Then you solve them:

    x+5=15      x+5=-15

    x=15-5       x=-15-5

    x=10           x=-20

    The solutions would be x=10 and x=-20 .

    In some cases, you only have one solution:

    I x + 5 I = 0

    0 cannot be negative, so we only have one equation to solve:

    x+5=0

    x=0-5

    x=-5

    The one solution would be x=-5 .

    In some OTHER cases, you have no solution. This happens when the absolute value equation equals to a negative number:

    I x + 5 I =-10

    Absolute value solutions are always going to end up positive because absolute value turns the number, negative or positive, into a positive.