Question

John spends $12 on his daily commute to work and $15 a day on lunch. Pam spends $6 on her daily commute and $8 a day on lunch. If x is the average number of work days in a month, what is the difference between the expenditures of John and Pam?
A) $41
B) $41x
C) $27x
D)$13x
E) $13

Answer 1

13x

Answer 2

$13x

Answer 3

Lets calculate John expenses, letting x be the number of days.
He spends $12 + $15 = $27 a day, which makes for a total of 27 times x, or 27x.

Looking at Pam, she spends $6 + $8 = $14 a day, which makes for a totaly of 14x.

To get the difference, we subtract:
27x-14x = 13x