A motel clerk counts his one dollar bills and ten dollars bills at the end of the day . He finds that he has a total of 58 dollars having a combined monetary value of 202 dollars. Find the number of bills each of each denomination that he has

I assume you are saying that he has only tens and ones.

let the number of ones be x
then the number of tens is 58-x

x + 10(58-x) = 202

solve for x, then use my definitions