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17-07-2016
Mathematics

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a number multiplied by two, decreased by four, is greater than nine.

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dalendrk dalendrk

17-07-2016

[tex]2x-4 \ \textgreater \ 9\ \ \ |add\ 4\ to\ both\ sides\\\\2x \ \textgreater \ 13\ \ \ |divide\ both\ sides\ by\ 2\\\\\boxed{x \ \textgreater \ 6.5\to x\in(6.5;\ \infty)} [/tex]

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