Given:
Number of coins = 36
There are twice as many quarters as there are nickels.
Let's find the number of quarters in the cup.
Let x represent the number of quarters.
Let y represent the number of nickels.
Since there are twice as many quarters as there are nickels, we have:
x = 2y
In this situation, we have the system of equations:
• x + y = 36
,
• x = 2y
Let's solve the system of equation simltaneously using substitution method.
Substitute 2y for x in equation 1:
2y + y = 36
3y = 36
Divide both sides by 3:
Substitute 12 for y in either equation.
Take equation 2:
x = 2y
x = 12(2)
x = 24
We have the solution:
x = 24, y = 12
Therefore, there are 24 quarters and 12 nickels in the cup.
ANSWER:
There are 24 quarters in the cup.