Let x = number of miles driven
Let n = $
$1.10x + $2.50 = n
$1.10x + $2.50 = $10
- $2.50 - $2.50
$1.10x = $7.50
———- ———-
$1.10 $1.10
x = 6 miles
check work
$1.10x + $2.50 = n
$1.10(6) + $2.50 = $10?
$6.60 + $2.50 = $10?
$9.10 = $10
you’ll have 90 cents left over