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Mathematics 4 Online
OpenStudy (anonymous):

solving proportions n/7=10/9 7/n=-3/5 6/4=9/x

OpenStudy (anonymous):

@freckles @mathstudent55

OpenStudy (anonymous):

N=70/9 N=-35/3 X=6

OpenStudy (anonymous):

Cross multiply on all of them. Let me draw it for you.|dw:1444866285077:dw|

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