The words contained in this file might help you see if this file matches what you are looking for:

...Math extralistofexercises as responsible for urban planning at the town council you have to completely reinstall all electricity gasandwaterlinesinthecity reinstallingonemileofelectricitylinecosts million takeshoursandrequiresworkers reinstallingonemileofgaslinecosts takes hoursandrequiresworkers reinstallingonemileofwaterlinecosts takeshours andrequiresworkers ifyouhaveamonthlybudgetof hourspermonthand ateamofworkers howmanymilesofeachlinecanyoureinstallinamonth solution thevariables x y and z will represent respectively milesofelectricitylineinstalledinamonth milesofgaslineinstalledinamonth milesofwaterlineinstalledinamonth thenumberofmilesofelectricity line times cost of one mile plus number miles gas water has be equaltothe thatihaveasbudget thisgivestheequation if we do same hours work get equation similarly workersneededgivestheequationx thuswehavetosolvethesystem whosematrixis let s solve systemusinggauss jordanelimination ateachstepthepivotwillbethecirclednumber forinstance for...