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The value of m, if 3,18,m,42 are in proportion

User Amitamb
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If its a proportion then


\\ \sf\longmapsto 42-m=m-18


\\ \sf\longmapsto 42+18=m+m


\\ \sf\longmapsto 2m=60


\\ \sf\longmapsto m=(60)/(2)


\\ \sf\longmapsto m=30

User Mropa
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