SOLUTION: mariko paid 135 for parts and labor on new brakes for her car if the parts cost 85 and the work takes 2.5 hours how much does the mechanic change per hour for labor

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Question 914282: mariko paid 135 for parts and labor on new brakes for her car if the parts cost 85 and the work takes 2.5 hours how much does the mechanic change per hour for labor
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +c+ = charge per hour for labor
+135+=+85+%2B+2.5c+
+2.5c+=+50+
+c+=+20+
labor is $20/hr