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28 March, 05:06

Which of the following is an example of an open equation? 5x + 7 = 12, 12 + (-8) = 4, 25 = 5 (5), 8 + 0 = 8

(math)

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  1. 28 March, 05:12
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    An open equation is an equation that contain one or more unknow variables.

    And that/those variable (s) can be found by solving the equation that make the equation true.

    A variable is an English alphabet.

    For example, a, b, x, y, z etc.

    A variable represents a unknow value for a particular quantity.

    In the given options 5x + 7 = 12, 12 + (-8) = 4, 25 = 5 (5), 8 + 0 = 8.

    In first option, we have unknow variable x is there.

    But in all other options we don't value any variable.

    Therefore, all other options can't be open equation.

    So, final answer is 5x + 7 = 12 is the only open equation in given options.
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