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OpenStudy (anonymous):
Barbie can paint a wall in 80 minutes, if she works alone. Barbie and Ken paint together for 20 minutes, then Barbie has to leave. It takes Ken 100 more minutes to complete the job. How long would it take Ken to paint the entire wall if he painted it alone?
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OpenStudy (fibonaccichick666):
Do you have any ideas for how to write an eq to express that?
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