Calculate this question

Question

A car rental costs $31 per day for the first 250 miles, plus .20 per mile for each additional mile. Gail's rental cost $67 for a one-day rental, how many miles did she drive altogether?

Answer 1

$67=$31+$0.20*m

67-31=0.2m

36=0.2m

360=2m

m=360/2

m=180 miles extra after the first 250 miles

250+180=430 miles driven altogether