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

Question

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

rock_mit182 · Answer

please help me out, i can't fail..

kropot72 · Answer

If you put the missing values in your question, someone can help you.

rock_mit182 · Answer

ok i will

rock_mit182 · Answer

Two mechanics worked on a car. The first mechanic worked for 5  hours, and the second mechanic worked for 15  hours. Together they charged a total of  $1575  . What was the rate charged per hour by each mechanic if the sum of the two rates was  $175  per hour?

rock_mit182 · Answer

@kropot72

kropot72 · Answer

Let the rate charged by the first mechanic be a, and let the rate charged by the second mechanic be b. Now we can write the following equations:
5a + 15b = 1575 ............(1)
a + b = 175 ....................(2)
By rearranging equation (2) you can find b in terms of a. Then plug that value for b into equation (1) and solve for a.

rock_mit182 · Answer

thanks dude!

kropot72 · Answer

You're welcome :)

rock_mit182 · Answer

I'm going to figuered out the values