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Mathematics 7 Online
OpenStudy (anonymous):

Solve |x + 5| < 9

hero (hero):

-9<x+5<9

hero (hero):

solve for x

OpenStudy (jamesj):

|x + 5| < 9 iff -9 < x + 5 < 9 iff -14 < x < 4, adding -5 to all expressions

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