Question 23163
1. Let number of miles driven be "x", then:
Sunset cost is 2195 + 23x cents for x miles driven
Sunrise cost is 2495 +19x cents for x miles driven
EQUATION: Set costs equal to one another and solve
for "x".
2. Let number of nickels be "x".
Then number of quarter is "25-x".
Value of nickels is (5)x cents
Value of quarters is (25)(25-x)= 625-25x cents
EQUATION:
 Value of nickels + Value of Quarters is 345 cents
       5x + 625-25x = 345
            -20x = -280
               x = 14 (number of nickels)
           25-x = 11 (number of quarters)
#3 This problem is done the same way as #2 except now
the coins are tickets and their respective values are
200 and 350 cents.  Give it a try.

Cheers,
Stan H.