Question 168192
Q+N=20 OR Q=20-N
.25(20-N)+.05N=2.60
5-.25N+.05N=2.60
-.2N=2.60-5
-.2N=-2.40
N=-2.40/-.2
N=12 NICKELS.
Q+12=20
Q=20-12
Q=8 QUARTERS.
pROOF:
.25*8+.05*12=2.60
2+.60=2.60
2.60=2.60