The cost of living (according to PAIP)

(student '(The daily cost of living for a group is the overhead cost plus the running cost for each person times the number of people in the group. This cost for one group equals $ 100, and the number of people in the group is 40. If the overhead cost is 10 times the running cost, find the overhead and running cost for each person.))

The equations to be solved are:
DAILY = (OVERHEAD + (RUNNING * PEOPLE))
COST = 100
PEOPLE = 40
OVERHEAD = (10 * RUNNING)
TO-FIND-1 = OVERHEAD
TO-FIND-2 = RUNNING

The solutions is:
PEOPLE = 40
COST = 100