guardianneangel
guardianneangel
10-06-2017
Mathematics
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Solve the inequality: 3|m+7|+9<30
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WojtekR
WojtekR
10-06-2017
[tex]3|m+7|+9\ \textless \ 30\quad|-9\\\\3|m+7|\ \textless \ 21\quad|:3\\\\|m+7|\ \textless \ 7\\\\\\-7\ \textless \ m+7\ \textless \ 7\quad|-7\\\\-14\ \textless \ m\ \textless \ 0\\\\\\\boxed{m\in\big(-14,0\big)}[/tex]
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