The point at which a company's cost equal its revenues is the break-even point. C represents the cost, in dollars, od x units of a product and R represents the revenue, in dollars, from the sale of x units. find the number of units that must be produce and sold in order to break even. that is, find the value of x for which C=R.

C=13x+36,000

R=15x

how many units must be produced and sold in order to break even?