The equation for the total revenue earned by a company for selling widgets is p=3q. The equation for the total cost of the company for producing widgets is p=q+4.

Question

Identify the break-even quantity.

Answer 1

break-even is where revenue = costs, so

3q = q+4
q=2

Answer 2

Minding my p's and q's, I would say:

if p = 3q
in p = q+4
3q = q+4
2q = 4
q = 2
then p = 6

Answer 3

4^-1.5