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OpenStudy (anonymous):
-3/4+7/9
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OpenStudy (mokeira):
\[\frac{ -3 }{4 }+\frac{ 7 }{ 9 }\] find LCM of 4 and 9 then simplify \[\frac{ (-27+28) }{ 36 }=\frac{ 1 }{ 36 }\]
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