NEED BREAKDOWN AND ANSWERS TO DEVELOPING QUESTIONS

Question

tires sell for $250 each and rims sell for $300. Three times as many tires were sold than rims. Total sales were $4,200. How manyof each were sold? What werethe total sales in dollars for each?

Answer 1

Let r stand for number of rims sold and t for number of tires.

By the first and third sentences, 250t+300r=4200

By the second sentence, we know r=3t. Substitute that value for r into the first equation and solve for t. Once you know the value of t, you can determine number of rims and total sales of each type.