Answer: 6 miles
Step-by-step explanation: If there is a $2 fix charge, that means she will have to pay $2 no matter how many miles she goes. So automatically, subtract $2 from the $20 that she has, which will now be $18 left. Now for every mile its $3. So $3 for one mile, $6 for two miles $9 for 3miles, $12..$15...$18 woop..stop there, thats how much she has ($18) So it will be $18 for 6 miles. Or you can just divide 18/3=6
