Question 975818
Two mechanics worked on a car. The first mechanic worked for 
10
 hours, and the second mechanic worked for 
5
 hours. Together they charged a total of 
$1000
. What was the rate charged per hour by each mechanic if the sum of the two rates was 
$155
 per hour?
----------------
F = 1st mechanic's rate
S = 2nd
----
F + S = 155
10F + 5S = 1000
2F + S = 200  (2nd eqn divided by 5)
F  + S = 155
------------------- Subtract
F = $45/hr
S = $110/hr