Question 28493
combined miles travelled = (1st car mpg x gals used) + (2nd car mpg x gals used)
let x = gallons used by 1st car. (60 - x)= gallons used by 2nd car
1700 = 30x + 25(60 - x)
200 = 5x
x = 40
(60 - x) = 20
check
1700 = 30 x 40 + 25 x 20
1700 = 1200 + 500
1700 = 1700
OK