Let the amount of shells collected by Aaron be

and the amount of shells collected by Maria be

respectively. Then the following system of equations should be solved:

First of all, express

out of first equation:

Then, replace

in second equation with found expression and solve it:



Finally, replace

in first equation with found value and solve it too:


So, Aaron has found
7 shells while Maria has found
21.
Answer:
Lm
Step-by-step explanation:
average = (sum of numbers)/(number of numbers)
Solve the equation for "sum of numbers":
sum of numbers = average * number of numbers
sum of numbers = m * L
sum of numbers = Lm
Answer: B) Lm
Answer: 250+3x
Step-by-step explanation: 250 for the bus and the students is $3 each so the students could be x.
Answer: 77/6 Answer as a mixed number: 12 5/6