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Two mechanics worked on a car. The first mechanic worked for 20 hours, and the second mechanic worked for 5 hours. Together they charged a total of 2150 dollars. What was the rate charged per hour by each mechanic if the sum of the two rates was 145 dollars per hour?

 Feb 20, 2021
 #1
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Let  the  rate of one mechanic  = x

Let  the other's rate=   145 - x

 

So  we  have

 

20x   +  5 ( 145 - x)    =  2150      simplify

 

20x  +  725  - 5x  =  2150

 

15x + 725  =  2150

 

15x  =  2150   -  725

 

15x =  1425      divide both  sides  by  15

 

x =  1425   /   15    =  $95   

 

145  -  95   =   $50

 

The  two  rates  were  $ 95    and  $ 50

 

 

cool cool cool

 Feb 20, 2021

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