Question

Two mechanics worked on a car. The first mechanic worked for 20 hours, and the second mechanic worked for 15 hours. Together they charged a total of $2100 . What was the rate charged per hour by each mechanic if the sum of the two rates was $125 per hour?

Answer 1

\[M_{1}+M_{2}=$2100\]

Answer 2

\[20x+15y=$125\]

Answer 3

should i use one variable

Answer 4

well you have

20x + 15y = 2100 total cost

and

x + y = 125 total of the hourly rates

solve simultaneously

Answer 5

x is the hourly rate for mechanic 1 y is the hourlyr ate for mechanic 2

Answer 6

so i had them backwards deep

Answer 7

ok thanks

Answer 8

sort of... you should always try to keep it as 2 unknowns in 2 equations..

they can be solved by elimination or substitution... whichever you feel most comfortable with

Answer 9

aye thanks