By 7:00P.M., 1/3 or the junior class has arrived at a school dance. By 8:09PM., 30 more juniors had arrived, raised attendance to 1/2 of the juniors class. How many people are in the juniors class?

I don’t understand.. can someone help?

A 30

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asked by Jessica
  1. (1/3 c) + 30 = 1/2 c

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    posted by Scott

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