James rides his bicycle every sunday morning. first, he pedals uphill at a speed of 4 miles per hour. then he rides downhill at a speed of 6 miles per hour. he covers a distance of 18 miles in 4 hours. write a linear equation for the distance pedaled, d miles

Because the question asks for total distance pedaled, we can set up the following equations:




x represents the amount of hours James spent pedaling uphill.
y represents the amount of hours James spent pedaling downhill.
4 represents the miles per hour James goes while pedaling uphill.
6 represents the miles per house James goes while pedaling downhill.