what is man days in one project

Question

The total costs for a design project was $9,924. The project was carried out by 5 technicians earning $116 per day and 5 draftsman earning $78 per day. If 98 man days were used on the project, how many man days were the draftsman employed?

Answer 1

98 man-dae=9924$ impli averaej kost=101.2653061$ per man-dae

That impli yu meen 1 tek man-dae=116$ & 1 draft man-dae=78$

x+y=98....or y=98-x

116x+78y=9924

116x +78(98-x)=9924

116x -78x+7644=9924

38x=9924-7644=2280

x=2280/38=60

y=98-x=98-60=38