Answer:

Step-by-step explanation:
Let's assign each person a variable using the first letter of his/her name.
Then we get the following equations based on the information given:

Then we can use substitution:

Rearrange the second equation:

Multiple the equation by 3:

Combine the equations to solve for a single variable (L):

Then we have a new equation:

Use substitution to get the rest:

8x=x+504
7x=504
x=72
Hope this helps :)
Answer:
Step-by-step explanation: its 56
Answer:
44h
Step-by-step explanation:
Auto repair shop Charge - $36
Replaced Parts - $8
Number of Hours - h
Formula to find the total cost
(Auto Repair Shop Charge + Replaced Parts) x Number of Hours
= (36 + 8) x h
= 44 x h
= 44h