Answer:
By writing an equation 0.50x + 900 = 0.38x + 1500 and solving (you can also write a system of equations)
Explanation:
The equation for company A's price is y = 0.50x + 900 ($0.50 per brochure plus flat fee of $900)
The equation for company B's price is y = 0.38x + 900 ($0.38 per brochure plus flat fee of $1500)
The goal is for the cost (y) to be the same so these equations would both have to be equal to each other. Once solving for x you will get 5000 brochures.
ALSO
you realize its bots making the links right?