Chairs cost $160.00 per carton and tables cost $465.00 per carton. If an order is received for a total of 100 cartons for $31,250.00, what is the number of cartons of chairs?

Solution:

There are x chairs and (100-x) tables

So

160x+465(100-x)=31250

x=50

So there are 50 cartons of chairs