Posted by Nicole on Saturday, September 7, 2013 at 5:31am.
In a project, Mr Tung's daily wage was $100 more than Mr Pang's. Although Mr Tung worked 3 days less than Mr Pang, both of them earned $3600. Find the number of days Mr Tung worked in the project.

Math.  Graham, Saturday, September 7, 2013 at 7:04am
Find x, the days Mr. Tung has worked.
Mr. Tung's daily wage is (3600/x).
Mr. Pang's daily wage is (3600/x)100.
Mr. Pang worked (x+3) days.
Therefore:
3600 = (3600/x 100)(x+3)
Multiply by x/100:
36x = (36x)(3+x)
Expand and rearrange into quadratic form. Then find the quadratic roots. At least one root will be the number of days Mr. Tung has worked.
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