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OpenStudy (anonymous):
eric can wash the family van is 1hr. stefan can wash it in 45 min. how long will it take them if they work together?
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OpenStudy (unklerhaukus):
w=60mins eric w=45 mins stefan w/60=e w/45=s e+s=w/60+w/45=
OpenStudy (unklerhaukus):
simplify and solve for w
OpenStudy (unklerhaukus):
how many minutes?
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