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10 November, 02:54

What expression is equivalent to 10 (2x + 9) + 10x - 12?

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  1. 10 November, 05:54
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    10 (2x + 9) + 10x - 12

    Solution.

    1. 10 (2x + 9) + 10x - 12

    2. 20x + 90 + 10x - 12

    3. 20x + 10x + 90 - 12

    Simplest form will be,

    4. 30x + 78

    5. 30x = - 78

    6. x = - 2.6
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