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
$2000
. what was the rate charged per hour by each mechanic if the sum of the two rates was
$115
per hour?
what is the first mechanics $ per hour? and what was the second mechanics $ per hour?

x=price per hour for first mechanic

y=price per hour for second mechanic

20x+15y=2000

x+y=115

solve

divide first equation by 5

4x+3y=400

multiply second equation by -3 and add to second

x=55

x+y=115

55+y=115

minus 55

y=60

first mechanic rage is $55 per hour

second mechanic is $60 per hour

  or  

step-by-step explanation:

if the four friends split the cost, p, of the pizza evenly, then each friend pays one-fourth of the cost of the pizza.

the expression is   or