This problem was already discussed before.. Seems to me that

This problem was already discussed before.. Seems to me that answer A is wrong..

Reasons are : we need to consider three cases.
1. He worked less 34 hours.
2. He worked 34-40 hours
3. He worked more than 40 hours..

When i try to solve, i see only complicated eqauations..And my gut feeling says it's E.. :wall :wall

Any has a quick soln for this ??

In one week a construction worker worked more than 40 hours, and was paid two times his regular hourly rate for every hour worked in excess of 40 hours. If he earned $780, how many hours did he work in that week?

(1) If he had worked 6 more hours that week, his earnings would have been $960.
(2) If he had worked 20 fewer hours that week, his earnings would have been $390 less that week.

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