Answer:
8 Miles
Step-by-step explanation:
Start by creating an equation based off what you know. To start we know it costs $3 Â just to get a ride + $2 for ever mile we travel (represent this using x)+ the $1 tip we left=$20.
3+2x+1=20
Now you add the like terms together(3+1)
2x+4=20 Â Subtract the 4 from both sides.
  -4  -4
2x=16 Â Â Â Now you just divide each side by 2
_ Â Â _
2 Â Â 2
x=8
Don't forget your label (miles)