Question

Shen drove 410 miles using 20 gallons of gas. At this rate, how many miles would he drive using 18 gallons of gas?

Answer 1

Let the number of miles he would drove using 18 gallons be x

Using proportion,

410 miles = 20 gallons

x miles = 18 gallons

cross-multiply

20x =7380

Divide both-side of the equation by 20

x = 369 miles