Two mechanics worked on a car. The first mechanic worked for 15 hours, and the second mechanic worked for 5 hours. Together they charged a t

Question

Two mechanics worked on a car. The first mechanic worked for 15 hours, and the second mechanic worked for 5 hours. Together they charged a total of $1725.
What was the rate charged per hour by each mechanic if the sum of the two rates was $195 per hour?
Note that the ALEKS graphing calculator can be used to make computations easier.
х
5
?
First mechanic: $ [per hour
Second mechanic: $ per hour

in progress 0
Khải Quang 4 years 2021-08-25T11:37:47+00:00 1 Answers 14 views 0

Answers ( )

  1. Sapo1
    0
    2021-08-25T11:39:31+00:00
    Reply

    Answer:

    75

    120

    Step-by-step explanation:

    Let the first mechanic’s hourly rate = x

    Let the second mechanic’s hourly rate = y

    x + y = 195

    15x + 5y = 1725        Divide this equation by 5

    3x + y = 345             Write the first equation below this one. Subtract

    x   + y = 195

    2x = 150                    Divide by 2

    x = 150/2

    x = 75

    ====================

    x + y = 195

    75 + y = 195

    y = 195 – 75

    y = 120

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )