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poohShaminici0ata
poohShaminici0ata poohShaminici0ata
  • 17-07-2016
  • Mathematics
Answered

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

Verified Answer :

dalendrk
dalendrk dalendrk
  • 17-07-2016

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

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