SOLUTION: Susan charges $80 plus $40 an hour to clean houses. If a client's total bill were $320, how many hours did Susan spend cleaning the client's house?

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Question 1146349: Susan charges $80 plus $40 an hour to clean houses. If a client's total bill were $320, how many hours did Susan spend cleaning the client's house?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +t+ = number of hours
+320+=+80+%2B+40t+
+40t+=+240+
+t+=+6+
She spent 6 hrs cleaning