Answer
The break even point occurs when 24 desks have been sold.
Work Step by Step
We want to find when the two equations are equal, for this is the break even point. From a and b, the equations are:
$ y = 200x+6000$
and
$ y = 450x$
We now set the equations equal to each other to find:
$ 450x = 200x+6000$
Solving gives:
$ x = 24$
The break even point occurs when 24 desks have been sold.
