You are picking up lumber at a lumber yard for a construction project. In addition to the ten (10) boards you already have, you
purchase thirty-five (35) more and receive two (2) extras for customer loyalty. How many boards do you have after the purchase? Type your answer in the box.
You must work backwards to isolate and find the answer, first making an equation and setting the unknown number as a variable, x. The answer is then the isolated value of x.