SOLUTION: A and B take 18 days to complete a piece of work .A left the work after 10 days and B takes 12 days more to complete the work.In how many A can complete the whole work?

Question 1064288: A and B take 18 days to complete a piece of work .A left the work after 10 days and B takes 12 days more to complete the work.In how many A can complete the whole work?
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
If A and B are their individual rates in WORK per DAYS, then this system describes the situation:

SIMPLFICATIONS

18A+18B=1
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10A+10B+12B=1
10A+22B=1
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Solve this system for A and B, but you will want the reciprocal of A, if the question you want is, how much time does "A" need alone to do one piece of work.
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