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Mathematics 15 Online
OpenStudy (anonymous):

help

OpenStudy (anonymous):

@Michele_Laino

OpenStudy (michele_laino):

hint: we have \[\Large \frac{4}{{20}} = \frac{5}{{25}} = \frac{7}{{35}} = \frac{8}{{40}} = ...?\]

OpenStudy (michele_laino):

|dw:1441043519415:dw|

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