Question

Peggy had three times as many quarters as nickels. She had $1.60 in all. How many nickels and how many quarters did she have?

Which of the following equations could be used to solve the problem?

n + 3n = 1.60
n + 3n = 160
5n + 75n = 1.60
5n + 75n = 160

Answer 1

Let q and n be the number of quarters and nickels, respectively.
Solve the following for q and n:\[\left\{\frac{q}{n}=3,5 n+25 q=160\right\} \]\[\{n=2,q=6\} \]