Question 1022920
n+q = 15 (1)
n = 4q substitute for n in equation (1)
4q+q = 15
5q = 15
q = 3 He has 3 quarters. And the problem says he has 4 times more nickels:
n = 3(4)= 12
And 3+12 = 15, just like the problem says.