The solution is (see part (a)):


To obtain a particular solution, choose arbitrary non-negative values for z and w. Since we are told that w must be 1,000, we are left to choose a value for z, so let us take z = 0, giving

as one possible solution. There are lots of other possible ones (and infintely many, in fact, since the number of vehicles passing per hour need not be an integer.)


To return to the review exercises, just close this window.